CVE-2015-6838
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 7.28% probability · 94th percentile
- CISA KEV
- Not listed
- Affected
- php/php · xmlsoft/libxml2
- Source
- security@opentext.com
References
- 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
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.