CVE-2007-4661

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2007-09-04 · updated 2026-06-16
Weakness: CWE-119

Description

The chunk_split function in string.c in PHP 5.2.3 does not properly calculate the needed buffer size due to precision loss when performing integer arithmetic with floating point numbers, which has unknown attack vectors and impact, possibly resulting in a heap-based buffer overflow. NOTE: this is due to an incomplete fix for CVE-2007-2872.

Affected products

PHP: 5.2.3

References

http://cvs.php.net/viewvc.cgi/php-src/ext/standard/string.c?r1=1.445.2.14.2.58&r2=1.445.2.14.2.59
http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html
http://secunia.com/advisories/26642
http://secunia.com/advisories/26838
http://secunia.com/advisories/27102
http://secunia.com/advisories/27864
http://secunia.com/advisories/28658
http://www.gentoo.org/security/en/glsa/glsa-200710-02.xml
http://www.php.net/ChangeLog-5.php#5.2.4
http://www.php.net/releases/5_2_4.php
http://www.ubuntu.com/usn/usn-549-2
https://issues.rpath.com/browse/RPL-1702

Get alerted when CVE-2007-4661 or the next vulnerability affects your stack