What’s Vulnerable › Vulnerabilities

CVE-2007-4657

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2007-09-04 · updated 2026-06-16
• Weakness: CWE-119

Description

Multiple integer overflows in PHP 4 before 4.4.8, and PHP 5 before 5.2.4, allow remote attackers to obtain sensitive information (memory contents) or cause a denial of service (thread crash) via a large len value to the (1) strspn or (2) strcspn function, which triggers an out-of-bounds read. NOTE: this affects different product versions than CVE-2007-3996.

Affected products

• Canonical Ubuntu Linux: 6.06, 6.10, 7.04, 7.10
• Debian Linux: 3.1, 4.0
• PHP: from 4.0.0 before 4.4.8; from 5.0.0 before 5.2.4 — fixed in 4.4.8, 5.2.4

How to fix

Upgrade to a fixed version: PHP 4.4.8, 5.2.4. Check the vendor advisory for mitigations.

References

• http://secunia.com/advisories/26642
• http://secunia.com/advisories/26822
• http://secunia.com/advisories/26838
• http://secunia.com/advisories/27102
• http://secunia.com/advisories/27377
• http://secunia.com/advisories/27864
• http://secunia.com/advisories/28249
• http://secunia.com/advisories/28318
• http://secunia.com/advisories/28936
• http://secunia.com/advisories/30288
• http://secweb.se/en/advisories/php-strcspn-information-leak-vulnerability/
• http://slackware.com/security/viewer.php?l=slackware-security&y=2008&m=slackware-security.335136

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