What’s Vulnerable › Vulnerabilities

CVE-2007-0988

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2007-02-20 · updated 2026-06-16
• Weakness: CWE-119

Description

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.

Affected products

• Canonical Ubuntu Linux: 5.10, 6.06, 6.10
• PHP: from 4.0.0 before 4.4.5; from 5.0.0 before 5.2.1; 4.0, 4.0-beta_4_patch1, 4.0-beta1, 4.0-beta2, 4.0-beta3, 4.0-beta4 (+2) — fixed in 4.4.5, 5.2.1

How to fix

Upgrade to a fixed version: PHP 4.4.5, 5.2.1. Check the vendor advisory for mitigations.

References

• http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=228858
• http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01056506
• http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01086137
• http://osvdb.org/32762
• http://rhn.redhat.com/errata/RHSA-2007-0089.html
• http://secunia.com/advisories/24195
• http://secunia.com/advisories/24217
• http://secunia.com/advisories/24236
• http://secunia.com/advisories/24248
• http://secunia.com/advisories/24284
• http://secunia.com/advisories/24295

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