CVE-2015-6838 Information

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Description

The xsl_ext_function_php function in ext/xsl/xsltprocessor.c in PHP before 5.4.45 5.5.x before 5.5.29 and 5.6.x before 5.6.13 when libxml2 before 2.9.2 is used does not consider the possibility of a NULL valuePop return value before proceeding with a free operation after the principal argument loop which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted XML document a different vulnerability than CVE-2015-6837.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

http://php.net/ChangeLog-5.php http://www.debian.org/security/2015/dsa-3358 http://www.securityfocus.com/bid/76733 http://www.securitytracker.com/id/1033548 https://bugs.php.net/bug.php?id=69782 https://security.gentoo.org/glsa/201606-10

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5