Inadequate Encryption Strength in SimpleSAMLphp - CVE-2017-12871
Published: September 1, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU38369
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-12871
CWE-ID: CWE-326
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
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).
Affected software
SimpleSAMLphp
How to mitigate CVE-2017-12871
Install update from vendor's website.