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Last updated: 8/30/2014 6:09:21 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2013-3735

Original release date: 05/31/2013
Last revised: 06/03/2013
Source: US-CERT/NIST

Overview

** DISPUTED ** 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."

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

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External Source: MISC
Name: https://bugs.php.net/bug.php?id=64660
External Source: CONFIRM
Name: https://github.com/php/php-src/blob/php-5.4.16RC1/NEWS
External Source: CONFIRM
Name: https://github.com/php/php-src/commit/fb58e69a84f4fde603a630d2c9df2fa3be16d846
Type: Patch Information; Exploit
External Source: CONFIRM
Name: https://github.com/php/php-src/blob/php-5.5.0RC2/NEWS

Technical Details

Vulnerability Type (View All)