CVE-2011-2688 SQL injection in n/a

What is CVE-2011-2688?

CVE-2011-2688 is a high-severity SQL injection vulnerability in Debian Debian Linux, published on 28 Jul 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

SQL injection vulnerability in mysql/mysql-auth.pl in the mod_authnz_external module 3.2.5 and earlier for the Apache HTTP Server allows remote attackers to execute arbitrary SQL commands via the user field.

Weakness: CWE-89

Which versions are affected by CVE-2011-2688?

It affects 2 products.

Products include Debian Debian Linux, Mod Authnz External Project Mod Authnz External.

How do I fix CVE-2011-2688?

Upgrade to a fixed version.

Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.

Is CVE-2011-2688 being exploited?

There is no known exploitation of CVE-2011-2688 in the wild and no public exploit code.

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• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2011-2688, DSA-2279-1, GHSA-9gr7-x6r9-35vw.