What’s Vulnerable › Vulnerabilities

CVE-2011-3348

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 22.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2011-09-20 · updated 2026-06-16
• Weakness: CWE-400

Description

The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.

Affected products

• Apache HTTP Server: from 2.2.12 through 2.2.20
• Red Hat JBoss Enterprise Web Server: 1.0.0

References

• http://community.jboss.org/message/625307
• http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21
• http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
• http://marc.info/?l=bugtraq&m=131731002122529&w=2
• http://marc.info/?l=bugtraq&m=132033751509019&w=2
• http://rhn.redhat.com/errata/RHSA-2012-0542.html
• http://rhn.redhat.com/errata/RHSA-2012-0543.html
• http://secunia.com/advisories/46013
• http://support.apple.com/kb/HT5130
• http://www.apache.org/dist/httpd/Announcement2.2.html
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:168
• http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html

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