CVE-2011-3607

Severity: medium (CVSS 4.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-11-08 · updated 2026-06-16
Weakness: CWE-189

Description

Integer overflow in the ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, allows local users to gain privileges via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, leading to a heap-based buffer overflow.

Affected products

Apache HTTP Server: 2.0, 2.0.9, 2.0.28, 2.0.28-beta, 2.0.32, 2.0.32-beta (+49)

References

http://archives.neohapsis.com/archives/fulldisclosure/2011-11/0023.html
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
http://marc.info/?l=bugtraq&m=133294460209056&w=2
http://marc.info/?l=bugtraq&m=133494237717847&w=2
http://marc.info/?l=bugtraq&m=134987041210674&w=2
http://rhn.redhat.com/errata/RHSA-2012-0128.html
http://rhn.redhat.com/errata/RHSA-2012-0542.html
http://rhn.redhat.com/errata/RHSA-2012-0543.html
http://secunia.com/advisories/45793
http://secunia.com/advisories/48551
http://securitytracker.com/id?1026267

Get alerted when CVE-2011-3607 or the next vulnerability affects your stack