Buffer overflow in PHP - CVE-2007-0988

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Main Vulnerability Database Vulnerabilities #VU110457

Buffer overflow in PHP - CVE-2007-0988

Published: October 10, 2019 / Updated: June 8, 2025


Vulnerability identifier: #VU110457
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2007-0988
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: PHP Group
Affected software:
PHP

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The zend_hash_init function in PHP 5 before 5.2.1 and PHP 4 before 4.4.5, when running on a 64-bit platform, allows context-dependent attackers to cause a denial of service (infinite loop) by unserializing certain integer expressions, which only cause 32-bit arguments to be used after the check for a negative value, as demonstrated by an "a:2147483649:{" argument. Availability also affected by time out alarm for the script, which helps prevent infinite loops.


How to mitigate CVE-2007-0988

Install update from vendor's website.

Sources