Reino: Security Features

La seguridad de un software no es un software de seguridad. Nos preocupamos de cuestiones como la autenticación, el control de acceso, la confidencialidad, la criptografía y la gestión de privilegios.

File Permission Manipulation

Abstract
Si se permite que la entrada de usuario modifique directamente los permisos de archivo, un atacante podría acceder a los recursos del sistema protegidos de otra forma.
Explanation
Se producen errores File Permission Manipulation cuando se cumplen algunas de las siguientes condiciones:

1. Un atacante puede especificar una ruta de acceso utilizada en una operación que modifica los permisos del sistema de archivos.

2. Un atacante puede especificar los permisos asignados por una operación en el sistema de archivos.

Ejemplo 1: El siguiente código utiliza la entrada de las variables de entorno del sistema para establecer los permisos de archivo. Si los atacantes pueden modificar las variables de entorno del sistema, pueden utilizar el programa para obtener acceso a los archivos que el programa ha manipulado. Si el programa también es vulnerable a Path Manipulation, un atacante puede utilizar esta vulnerabilidad para obtener acceso a archivos arbitrarios del sistema.


permissions := strconv.Atoi(os.Getenv("filePermissions"));
fMode := os.FileMode(permissions)
os.chmod(filePath, fMode);
...
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 264, CWE ID 732
[2] Standards Mapping - Common Weakness Enumeration Top 25 2019 [15] CWE ID 732
[3] Standards Mapping - Common Weakness Enumeration Top 25 2020 [16] CWE ID 732
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [22] CWE ID 732
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-002165
[6] Standards Mapping - FIPS200 AC
[7] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement
[10] Standards Mapping - OWASP API 2023 API3 Broken Object Property Level Authorization
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3), 4.3.3 Other Access Control Considerations (L2 L3), 7.3.3 Log Protection Requirements (L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[15] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls
[28] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 732
[29] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 732
[30] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 732
[31] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[46] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.golang.file_permission_manipulation
Abstract
Si se permite que la entrada de usuario modifique directamente los permisos de archivo, un atacante puede acceder a los recursos del sistema protegidos de otra forma.
Explanation
Se producen errores de File Permission Manipulation cuando se cumplen algunas de las siguientes condiciones:

1. Un atacante puede especificar una ruta de acceso utilizada en una operación que modifica los permisos del sistema de archivos.

2. Un atacante puede especificar los permisos asignados por una operación en el sistema de archivos.

Ejemplo 1: el siguiente código utiliza la entrada desde las propiedades del sistema para establecer la máscara de permisos predeterminada. Si los atacantes pueden modificar las propiedades del sistema, pueden utilizar el programa para obtener acceso a los archivos que el programa ha manipulado. Si el programa también es vulnerable a la manipulación de rutas de acceso, un usuario malintencionado puede utilizar esta vulnerabilidad para obtener acceso a archivos arbitrarios del sistema.


String permissionMask = System.getProperty("defaultFileMask");
Path filePath = userFile.toPath();
...
Set<PosixFilePermission> perms = PosixFilePermissions.fromString(permissionMask);
Files.setPosixFilePermissions(filePath, perms);
...
References
[1] FIO01-J. Create files with appropriate access permissions CERT
[2] Standards Mapping - Common Weakness Enumeration CWE ID 264, CWE ID 732
[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [15] CWE ID 732
[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [16] CWE ID 732
[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [22] CWE ID 732
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-002165
[7] Standards Mapping - FIPS200 AC
[8] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement
[11] Standards Mapping - OWASP API 2023 API3 Broken Object Property Level Authorization
[12] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3), 4.3.3 Other Access Control Considerations (L2 L3), 7.3.3 Log Protection Requirements (L2 L3)
[13] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[14] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[15] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[16] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls
[29] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 732
[30] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 732
[31] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 732
[32] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[47] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.java.file_permission_manipulation
Abstract
Si se permite que la entrada de usuario modifique directamente los permisos de archivo, un atacante puede acceder a los recursos del sistema protegidos de otra forma.
Explanation
Se producen errores de manipulación de permisos de archivo cuando se cumplen algunas de las siguientes condiciones:

1. Un atacante puede especificar una ruta de acceso utilizada en una operación que modifica los permisos del sistema de archivos.

2. Un atacante puede especificar los permisos asignados por una operación en el sistema de archivos.

Ejemplo 1: El siguiente código se ha diseñado para establecer los permisos de archivo adecuados para los usuarios que cargan las páginas web a través de FTP. Utiliza la entrada de una solicitud HTTP para marcar un archivo como visible para los usuarios externos.


$rName = $_GET['publicReport'];
chmod("/home/". authenticateUser . "/public_html/" . rName,"0755");
...


Sin embargo, si un usuario malintencionado proporciona un valor malicioso para publicReport como, por ejemplo, "../../localuser/public_html/.htpasswd", la aplicación hará que el archivo especificado sea legible para el usuario malintencionado.

Ejemplo 2: el siguiente código utiliza la entrada desde un archivo de configuración para establecer la máscara de permisos predeterminada. Si los usuarios malintencionados pueden modificar el archivo de configuración, pueden utilizar el programa para obtener acceso a los archivos que el programa ha manipulado. Si el programa también es vulnerable a la manipulación de rutas de acceso, un usuario malintencionado puede utilizar esta vulnerabilidad para obtener acceso a archivos arbitrarios del sistema.


...
$mask = $CONFIG_TXT['perms'];
chmod($filename,$mask);
...
References
[1] G. Hoglund, G. McGraw Exploiting Software Addison-Wesley
[2] Standards Mapping - Common Weakness Enumeration CWE ID 264, CWE ID 732
[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [15] CWE ID 732
[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [16] CWE ID 732
[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [22] CWE ID 732
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-002165
[7] Standards Mapping - FIPS200 AC
[8] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement
[11] Standards Mapping - OWASP API 2023 API3 Broken Object Property Level Authorization
[12] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3), 4.3.3 Other Access Control Considerations (L2 L3), 7.3.3 Log Protection Requirements (L2 L3)
[13] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[14] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[15] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[16] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls
[29] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 732
[30] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 732
[31] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 732
[32] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[47] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.php.file_permission_manipulation
Abstract
Si se permite que la entrada de usuario modifique directamente los permisos de archivo, un atacante puede acceder a los recursos del sistema protegidos de otra forma.
Explanation
Se producen errores de File Permission Manipulation cuando se cumplen algunas de las siguientes condiciones:

1. Un atacante puede especificar una ruta de acceso utilizada en una operación que modifica los permisos del sistema de archivos.

2. Un atacante puede especificar los permisos asignados por una operación en el sistema de archivos.

Ejemplo 1: El siguiente código utiliza la entrada de las variables de entorno del sistema para establecer los permisos de archivo. Si los atacantes pueden modificar las variables de entorno del sistema, pueden utilizar el programa para obtener acceso a los archivos que el programa ha manipulado. Si el programa también es vulnerable a Path Manipulation, un atacante puede utilizar esta vulnerabilidad para obtener acceso a archivos arbitrarios del sistema.


permissions = os.getenv("filePermissions");
os.chmod(filePath, permissions);
...
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 264, CWE ID 732
[2] Standards Mapping - Common Weakness Enumeration Top 25 2019 [15] CWE ID 732
[3] Standards Mapping - Common Weakness Enumeration Top 25 2020 [16] CWE ID 732
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [22] CWE ID 732
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-002165
[6] Standards Mapping - FIPS200 AC
[7] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement
[10] Standards Mapping - OWASP API 2023 API3 Broken Object Property Level Authorization
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3), 4.3.3 Other Access Control Considerations (L2 L3), 7.3.3 Log Protection Requirements (L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[15] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls
[28] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 732
[29] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 732
[30] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 732
[31] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[46] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.python.file_permission_manipulation
Abstract
Si se permite que la entrada de usuario modifique directamente los permisos de archivo, un atacante puede acceder a los recursos del sistema protegidos de otra forma.
Explanation
Se producen errores de manipulación de permisos de archivo cuando se cumplen algunas de las siguientes condiciones:

1. Un atacante puede especificar una ruta de acceso utilizada en una operación que modifica los permisos del sistema de archivos.

2. Un atacante puede especificar los permisos asignados por una operación en el sistema de archivos.

Ejemplo 1: El siguiente código se ha diseñado para establecer los permisos de archivo adecuados para los usuarios que cargan las páginas web a través de FTP. Utiliza la entrada de una solicitud HTTP para marcar un archivo como visible para los usuarios externos.


...
rName = req['publicReport']
File.chmod("/home/#{authenticatedUser}/public_html/#{rName}", "0755")
...


Sin embargo, si un usuario malintencionado proporciona un valor malicioso para publicReport como, por ejemplo, "../../localuser/public_html/.htpasswd", la aplicación hará que el archivo especificado sea legible para el usuario malintencionado.

Ejemplo 2: el siguiente código utiliza la entrada desde un archivo de configuración para establecer la máscara de permisos predeterminada. Si los atacantes pueden modificar el archivo de configuración, podrían utilizar el programa para obtener acceso a los archivos que el programa ha manipulado. Si el programa también es vulnerable a la manipulación de rutas de acceso, un usuario malintencionado puede utilizar esta vulnerabilidad para obtener acceso a archivos arbitrarios del sistema.


...
mask = config_params['perms']
File.chmod(filename, mask)
...
References
[1] G. Hoglund, G. McGraw Exploiting Software Addison-Wesley
[2] Standards Mapping - Common Weakness Enumeration CWE ID 264, CWE ID 732
[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [15] CWE ID 732
[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [16] CWE ID 732
[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [22] CWE ID 732
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-002165
[7] Standards Mapping - FIPS200 AC
[8] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement
[11] Standards Mapping - OWASP API 2023 API3 Broken Object Property Level Authorization
[12] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3), 4.3.3 Other Access Control Considerations (L2 L3), 7.3.3 Log Protection Requirements (L2 L3)
[13] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[14] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[15] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[16] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls
[29] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 732
[30] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 732
[31] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 732
[32] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II
[47] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.ruby.file_permission_manipulation