CVE-2018-6521

CRITICAL9.8EPSS 0.58%

SimpleSAMLphp Use of insecure connection charset (sqlauth module)

Published: 5/13/2022Modified: 4/28/2026

Also known as:GHSA-qv5p-6wrc-79wgDEBIAN-CVE-2018-6521

Description

The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon encountering four-byte characters. There might be a scenario in which this allows remote attackers to bypass intended access restrictions.

Affected packages (2)

Debian/simplesamlphpfrom 0, < 1.15.2-1
Packagist/simplesamlphp/simplesamlphpfrom 0, < 1.15.2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	CRITICAL9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (7)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2018-6521
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2018-6521
PATCHhttps://github.com/simplesamlphp/simplesamlphp
WEBhttps://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2018-6521.yaml
WEBhttps://lists.debian.org/debian-lts-announce/2018/02/msg00008.html
WEBhttps://simplesamlphp.org/security/201801-03
WEBhttps://www.debian.org/security/2018/dsa-4127