Insecure Initialization Vector Usage in aesEncrypt Method in SimpleSAMLphp

CVE-2017-12871 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:N/A:N

The aesEncrypt method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.x through 1.14.11 makes it easier for context-dependent attackers to bypass the encryption protection mechanism by leveraging use of the first 16 bytes of the secret key as the initialization vector (IV).

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