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CVE-2015-6838

Date: May 16, 2016

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.

Language: C

Severity Score

Related Resources (10)

https://bugs.php.net/bug.php?id=69782
http://www.securityfocus.com/bid/76733
http://www.debian.org/security/2015/dsa-3358
http://www.securitytracker.com/id/1033548
http://php.net/ChangeLog-5.php
https://nvd.nist.gov/vuln/detail/CVE-2015-6838
https://security.gentoo.org/glsa/201606-10
https://people.canonical.com/~ubuntu-security/cve/CVE-2015-6838
https://access.redhat.com/security/cve/CVE-2015-6838
https://www.mend.io/vulnerability-database/CVE-2015-6838

Severity Score

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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