CVE-2017-12871

MEDIUM5.9EPSS 0.08%

SimpleSAMLphp Incorrect IV generation for encryption

Published: 5/17/2022Modified: 4/28/2026

Also known as:GHSA-ww3w-592j-5qrwDEBIAN-CVE-2017-12871

Description

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 packages (2)

Debian/simplesamlphpfrom 0, < 1.14.15-1
Packagist/simplesamlphp/simplesamlphp>= 1.14.0, < 1.14.12

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.9	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References (7)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2017-12871
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2017-12871
PATCHhttps://github.com/simplesamlphp/simplesamlphp
WEBhttps://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-12871.yaml
WEBhttps://github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904
WEBhttps://github.com/simplesamlphp/simplesamlphp/commit/ccf75981187aa88f7165abdb1b1965c0934acda0
WEBhttps://simplesamlphp.org/security/201703-02