Weak Encryption: Inadequate RSA Padding

ABSTRACT

RSA 算法在沒有 OAEP 填充模式下使用，因此加密機制比較脆弱。

在實踐中使用時，RSA 通常會與某些填充模式結合使用。該填充模式的目的在于防止一些潛在的針對不帶填充模式的 RSA 發動的攻擊。

例 1：下列代碼使用不帶適當填充模式的 RSA 加密算法。


function encrypt($input, $key) { 
$output='';
openssl_public_encrypt($input, $output, $key, OPENSSL_NO_PADDING);
return $output;
  }

[1] Standards Mapping - OWASP Top 10 2010 - (OWASP 2010) A7 Insecure Cryptographic Storage

[2] Standards Mapping - OWASP Top 10 2007 - (OWASP 2007) A8 Insecure Cryptographic Storage

[3] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A8 Insecure Storage

[4] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP3150.1 CAT II

[5] Standards Mapping - Security Technical Implementation Guide Version 3.4 - (STIG 3.4) APP3150.1 CAT II

[6] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 325

[7] Standards Mapping - Web Application Security Consortium 24 + 2 - (WASC 24 + 2) Information Leakage

[8] Standards Mapping - FIPS200 - (FISMA) MP

[9] OPENSSL Documentation

[10] PKCS #1 v2.1:RSA Cryptography Standard

[11] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 - (PCI 1.2) Requirement 6.3.1.3, Requirement 6.5.8

[12] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 - (PCI 2.0) Requirement 6.5.3

[13] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.8

[14] Wikipedia