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CVE-2009-4143

30
FAUCET Score

CVE-2009-4143 describes a critical vulnerability in PHP versions prior to 5.2.12, stemming from improper handling of session data, specifically impacting the SESSION superglobal array and the session.save_path directive. With a CVSS score of 10.0, this flaw allows for complete compromise of confidentiality, integrity, and availability with low attack complexity and no authentication required. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.2.11CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:php:php:1.0:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:php:php:2.0:*:*:*:*:*:*:*
2.0b10CPE matchmatch criteria
cpe:2.3:a:php:php:2.0b10:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:php:php:3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
2.95%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0295 is in the 74th percentile among its peer group of 51,551 CVEs.

Social Chatter

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-2009-4143

php: $_SESSION usort() interruption corruption

Dec 16, 2009

References

lists.apple.com / archives/security-announce/2010//Mar/msg00001.html
marc.info
secunia.com / advisories/37821
Vendor Advisory
secunia.com / advisories/38648
Vendor Advisory
secunia.com / advisories/40262
Vendor Advisory
secunia.com / advisories/41480
Vendor Advisory
secunia.com / advisories/41490
Vendor Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7439
support.apple.com / kb/HT4077
debian.org / security/2010/dsa-2001
itrc.hp.com / service/cki/docDisplay.do
mandriva.com / security/advisories
php.net / ChangeLog-5.php
php.net / releases/5_2_12.php
Vendor Advisory
securityfocus.com / bid/37390
vupen.com / english/advisories/2009/3593
Vendor Advisory