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CVE-2012-2329

70
FAUCET Score

CVE-2012-2329 describes a buffer overflow vulnerability in the apache_request_headers function within PHP 5.4.x versions prior to 5.4.3. This flaw allows remote attackers to trigger a denial of service by sending a specially crafted, long HTTP header. The vulnerability has a CVSS score of 5.0, indicating a medium severity, and is easily exploitable over the network without authentication, leading to an application crash. Exploit code, including a Metasploit module, is publicly available, and the vulnerability has received significant community discussion and media coverage, with reports of active exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
5.4.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.4.0:*:*:*:*:*:*:*
5.4.1CPE matchmatch criteria
cpe:2.3:a:php:php:5.4.1:*:*:*:*:*:*:*
5.4.2CPE matchmatch criteria
cpe:2.3:a:php:php:5.4.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
62.65%
Probability of exploitation in next 30 days
EPSS Percentile
99.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: PHP apache_request_headers Function Buffer Overflow · May 8, 2012
ExploitDB: EDB-19231 · Jun 17, 2012
This CVE's current EPSS score of 0.6265 is in the 99th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2012-2329Important

php: buffer overflow flaw in apache_request_headers() in PHP 5.4.x

May 8, 2012

References

bugs.php.net / bug.php
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/49014
exchange.xforce.ibmcloud.com / vulnerabilities/75545
h20564.www2.hp.com / portal/site/hpsc/public/kb/docDisplay
php.net / archive/2012.php
php.net / ChangeLog-5.php
securityfocus.com / bid/53455