Reino: Code Quality

Códigos de baixa qualidade levam a comportamentos imprevisíveis. Da perspectiva do usuário, isso normalmente se manifesta como usabilidade ruim. Para um invasor, trata-se de uma oportunidade para atacar o sistema de formas imprevistas.

Intent Manipulation: Mutable Pending Intent

Abstract
Uma PendingIntent foi detectada com seu valor de sinalizador definido como FLAG_MUTABLE. Intenções pendentes criadas com o valor do sinalizador de FLAG_MUTABLE são suscetíveis a ter campos não especificados Intent definido a jusante, que pode modificar a capacidade da Intent e deixar o sistema aberto a vulnerabilidades.
Explanation
Permitindo a modificação da Intent subjacente de uma PendingIntent após sua criação pode deixar um sistema aberto a ataques. Isso depende principalmente da capacidade geral da Intent subjacente. Na maioria dos casos, é uma prática recomendada evitar possíveis problemas definindo o sinalizador PendingIntent como FLAG_IMMUTABLE.

Exemplo 1: O seguinte inclui uma PendingIntent criada com um valor de sinalizador de FLAG_MUTABLE.


...
val intent_flag_mut = Intent(Intent.ACTION_GTALK_SERVICE_DISCONNECTED, Uri.EMPTY, this, DownloadService::class.java)
val flag_mut = PendingIntent.FLAG_MUTABLE

val pi_flagmutable = PendingIntent.getService(
    this,
    0,
    intent_flag_mut,
    flag_mut
)
...
References
[1] Remediation for Implicit PendingIntent Vulnerability
[2] Standards Mapping - Common Weakness Enumeration CWE ID 99
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection
[7] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[8] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1
[9] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.4
[10] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8
[11] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[16] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[17] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[18] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[19] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[20] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[21] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[22] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[23] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002400 CAT II
[24] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002400 CAT II
[25] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002400 CAT II
[26] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002400 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002400 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002400 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002400 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002400 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002400 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002400 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002400 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002400 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002400 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002400 CAT II
[37] Standards Mapping - Web Application Security Consortium Version 2.00 Denial of Service (WASC-10)
[38] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.controlflow.java.intent_manipulation_mutable_pending_intent