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CVE-2007-4661

20
FAUCET Score

CVE-2007-4661 describes a heap-based buffer overflow vulnerability in the chunk_split function within PHP 5.2.3, stemming from an incomplete fix for a prior issue. This flaw arises from precision loss during integer arithmetic with floating-point numbers when calculating buffer sizes. With a CVSS score of 7.5, this vulnerability is remotely exploitable with low attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.2.3CPE matchmatch criteria
cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.36%
Probability of exploitation in next 30 days
EPSS Percentile
82.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0236 is in the 68th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2007-4661Moderate

php size calculation in chunk_split

Aug 30, 2007

References

cvs.php.net / viewvc.cgi/php-src/ext/standard/string.c
Exploit
lists.opensuse.org / opensuse-security-announce/2008-01/msg00006.html
secunia.com / advisories/26642
Patch
secunia.com / advisories/26838
secunia.com / advisories/27102
secunia.com / advisories/27864
secunia.com / advisories/28658
issues.rpath.com / browse/RPL-1702
launchpad.net / bugs/173043
usn.ubuntu.com / 549-1
gentoo.org / security/en/glsa/glsa-200710-02.xml
php.net / ChangeLog-5.php
php.net / releases/5_2_4.php
Patch
ubuntu.com / usn/usn-549-2