CVE-2013-3735: php Improper Input Validation

Vulnerability summary

CVE-2013-3735 is a high (CVSS 7.5) Improper Input Validation vulnerability in php. EPSS estimates a 2.83% chance of exploitation in the next 30 days, higher than 86.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 31-05-2013
   PublishedVulnerability first disclosed.
2. 16-01-2025
   Last modifiedVulnerability information updated.

Description

The Zend Engine in PHP before 5.4.16 RC1, and 5.5.0 before RC2, does not properly determine whether a parser error occurred, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash) via a crafted function definition, as demonstrated by an attack within a shared web-hosting environment. NOTE: the vendor's http://php.net/security-note.php page says "for critical security situations you should be using OS-level security by running multiple web servers each as their own user id.

• CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.