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CVE-2007-2844

24
FAUCET Score

CVE-2007-2844 describes a race condition vulnerability in PHP 4.x and 5.x before version 5.2.1, specifically on multi-threaded systems. This flaw arises from the lack of thread safety in libc crypt function calls, allowing remote attackers to overwrite internal program memory. With a CVSS score of 9.3, this vulnerability is critical, enabling full compromise of confidentiality, integrity, and availability with medium attack complexity and no authentication required. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:php:php:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:php:php:4.0:beta_4_patch1:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:php:php:4.0:beta1:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:php:php:4.0:beta2:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:php:php:4.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.86%
Probability of exploitation in next 30 days
EPSS Percentile
85.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0286 is in the 43rd percentile among its peer group of 8,918 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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-2007-2844

php crypt function not re-entrant

References

blog.php-security.org / archives/82-Suhosin-0.9.20-and-crypt-Thread-Safety-Vulnerability.html
osvdb.org / 36088
secunia.com / advisories/25434
exchange.xforce.ibmcloud.com / vulnerabilities/34601
securityfocus.com / bid/24109