Vulnerability in Apache HTTP Server
CVE-2011-3607
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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.4 (Medium). Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.047 (91.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.047 · newest: 0.047 · change: +0.000
Affected products
- Apache HTTP Server — versions 2.0, 2.0.9, 2.0.28
Weakness classification (CWE)
Public proof-of-concept exploits
References
- h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp (vendor-advisory)
- marc.info/ (vendor-advisory)
- bugs.launchpad.net/ubuntu/+source/apache2/+bug/811422 (Exploit)
- www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html (Exploit)
- rhn.redhat.com/errata/RHSA-2012-0543.html (vendor-advisory)
- bugzilla.redhat.com/show_bug.cgi
- marc.info/ (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2012-0128.html (vendor-advisory)
- www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- secunia.com/advisories/45793 (Vendor Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2011-3607?
- CVE-2011-3607 is a vulnerability in Apache HTTP Server, classified under CWE-189. Published 2011-11-08.
- Is CVE-2011-3607 known to be exploited?
- 23 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.