Reino: Errors

Os erros e o processamento de erros representam uma classe de API. Erros relacionados com o processamento de erros são tão comuns que merecem um domínio próprio. Assim como no “abuso de API”, há duas formas de introduzir uma vulnerabilidade de segurança relacionada com erros. A primeira, e mais comum, é processar os erros indevidamente (ou não os processar). A segunda é produzir erros que revelem muitas informações (a possíveis invasores) ou que sejam difíceis de processar.

Poor Error Handling: Return Inside Finally

Abstract
O retorno de dentro de um bloco finally fará com que exceções sejam perdidas.
Explanation
Uma instrução de retorno dentro de um bloco finally fará com que qualquer exceção que possa ser lançada no bloco "try" seja descartada.

Exemplo 1: No seguinte trecho de código, a MagicException lançada pela segunda chamada para doMagic com true transmitido para ela nunca será entregue para o chamador. A instrução de retorno dentro do bloco finally fará com que a exceção seja descartada.


public class MagicTrick {

public static class MagicException extends Exception { }

public static void main(String[] args) {

System.out.println("Watch as this magical code makes an " +
"exception disappear before your very eyes!");

System.out.println("First, the kind of exception handling " +
"you're used to:");
try {
doMagic(false);
} catch (MagicException e) {
// An exception will be caught here
e.printStackTrace();
}

System.out.println("Now, the magic:");
try {
doMagic(true);
} catch (MagicException e) {
// No exception caught here, the finally block ate it
e.printStackTrace();
}
System.out.println("tada!");
}

public static void doMagic(boolean returnFromFinally)
throws MagicException {

try {
throw new MagicException();
}
finally {
if (returnFromFinally) {
return;
}
}
}

}
References
[1] ERR04-J. Do not complete abruptly from a finally block CERT
[2] Standards Mapping - Common Weakness Enumeration CWE ID 584
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001312, CCI-001314, CCI-003272
[4] Standards Mapping - FIPS200 AU
[5] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 SA-15 Development Process and Standards and Tools (P2), SI-11 Error Handling (P2)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 SA-15 Development Process and Standards and Tools, SI-11 Error Handling
[8] Standards Mapping - OWASP Top 10 2004 A7 Improper Error Handling
[9] Standards Mapping - OWASP Top 10 2007 A6 Information Leakage and Improper Error Handling
[10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.7
[11] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.2, Requirement 6.5.6
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.5
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.5
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.5
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.5
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.5
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[18] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 3.6 - Sensitive Data Retention
[19] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 3.6 - Sensitive Data Retention, Control Objective B.3.2 - Terminal Software Attack Mitigation
[20] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 3.6 - Sensitive Data Retention, Control Objective B.3.2 - Terminal Software Attack Mitigation
[21] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3120 CAT II
[22] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3120 CAT II
[23] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3120 CAT II
[24] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3120 CAT II
[25] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3120 CAT II
[26] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3120 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3120 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
desc.structural.java.poor_error_handling_return_inside_finally
Abstract
O retorno de dentro de um bloco finally fará com que exceções sejam perdidas.
Explanation
Uma instrução de retorno dentro de um bloco finally fará com que qualquer exceção que possa ser lançada no bloco "try" seja descartada.

Exemplo 1: No seguinte trecho de código, a exception lançada pela segunda chamada para doMagic com True transmitido para ela nunca será entregue para o chamador. A instrução de retorno dentro do bloco finally fará com que a exceção seja descartada.

        "disappear before your very eyes!" . PHP_EOL;

echo "First, the kind of exception handling " .
"you're used to:" . PHP_EOL;

try {
doMagic(False);
} catch (exception $e) {
// An exception will be caught here
echo $e->getMessage();
}

echo "Now, the magic:" . PHP_EOL;

try {
doMagic(True);
} catch (exception $e) {
// No exception caught here, the finally block ate it
echo $e->getMessage();
}

echo "Tada!" . PHP_EOL;

function doMagic($returnFromFinally) {
try {
throw new Exception("Magic Exception" . PHP_EOL);
}
finally {
if ($returnFromFinally) {
return;
}
}
}
?>
References
[1] ERR04-J. Do not complete abruptly from a finally block CERT
[2] Standards Mapping - Common Weakness Enumeration CWE ID 584
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001312, CCI-001314, CCI-003272
[4] Standards Mapping - FIPS200 AU
[5] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 SA-15 Development Process and Standards and Tools (P2), SI-11 Error Handling (P2)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 SA-15 Development Process and Standards and Tools, SI-11 Error Handling
[8] Standards Mapping - OWASP Top 10 2004 A7 Improper Error Handling
[9] Standards Mapping - OWASP Top 10 2007 A6 Information Leakage and Improper Error Handling
[10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.7
[11] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.2, Requirement 6.5.6
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.5
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.5
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.5
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.5
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.5
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[18] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 3.6 - Sensitive Data Retention
[19] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 3.6 - Sensitive Data Retention, Control Objective B.3.2 - Terminal Software Attack Mitigation
[20] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 3.6 - Sensitive Data Retention, Control Objective B.3.2 - Terminal Software Attack Mitigation
[21] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3120 CAT II
[22] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3120 CAT II
[23] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3120 CAT II
[24] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3120 CAT II
[25] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3120 CAT II
[26] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3120 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3120 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
desc.structural.php.poor_error_handling_return_inside_finally