First published: Mon May 16 2016(Updated: )
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.
Credit: meissner@suse.de
Affected Software | Affected Version | How to fix |
---|---|---|
PHP | =5.6.0-alpha1 | |
PHP | =5.6.0-alpha2 | |
PHP | =5.6.0-alpha3 | |
PHP | =5.6.0-alpha4 | |
PHP | =5.6.0-alpha5 | |
PHP | =5.6.0-beta1 | |
PHP | =5.6.0-beta2 | |
PHP | =5.6.0-beta3 | |
PHP | =5.6.0-beta4 | |
PHP | =5.6.1 | |
PHP | =5.6.2 | |
PHP | =5.6.3 | |
PHP | =5.6.4 | |
PHP | =5.6.5 | |
PHP | =5.6.6 | |
PHP | =5.6.7 | |
PHP | =5.6.8 | |
PHP | =5.6.9 | |
PHP | =5.6.10 | |
PHP | =5.6.11 | |
PHP | =5.6.12 | |
libxml2-devel | <=2.9.1 | |
PHP | =5.5.0 | |
PHP | =5.5.0-alpha1 | |
PHP | =5.5.0-alpha2 | |
PHP | =5.5.0-alpha3 | |
PHP | =5.5.0-alpha4 | |
PHP | =5.5.0-alpha5 | |
PHP | =5.5.0-alpha6 | |
PHP | =5.5.0-beta1 | |
PHP | =5.5.0-beta2 | |
PHP | =5.5.0-beta3 | |
PHP | =5.5.0-beta4 | |
PHP | =5.5.0-rc1 | |
PHP | =5.5.0-rc2 | |
PHP | =5.5.1 | |
PHP | =5.5.2 | |
PHP | =5.5.3 | |
PHP | =5.5.4 | |
PHP | =5.5.5 | |
PHP | =5.5.6 | |
PHP | =5.5.7 | |
PHP | =5.5.8 | |
PHP | =5.5.9 | |
PHP | =5.5.10 | |
PHP | =5.5.11 | |
PHP | =5.5.12 | |
PHP | =5.5.13 | |
PHP | =5.5.14 | |
PHP | =5.5.15 | |
PHP | =5.5.16 | |
PHP | =5.5.17 | |
PHP | =5.5.18 | |
PHP | =5.5.19 | |
PHP | =5.5.20 | |
PHP | =5.5.21 | |
PHP | =5.5.22 | |
PHP | =5.5.23 | |
PHP | =5.5.24 | |
PHP | =5.5.25 | |
PHP | =5.5.26 | |
PHP | =5.5.27 | |
PHP | =5.5.28 | |
PHP | <=5.4.44 |
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CVE-2015-6838 is rated as having a medium severity, due to the potential for an attacker to exploit PHP's XSLT processor.
To fix CVE-2015-6838, upgrade to PHP version 5.6.13 or newer, or to 5.5.29 or newer.
PHP versions before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 are vulnerable to CVE-2015-6838.
CVE-2015-6838 affects the xsl_ext_function_php function in PHP when using libxml2 versions earlier than 2.9.2.
CVE-2015-6838 does not directly enable remote code execution but may allow an attacker to exploit the XSLT processor under specific conditions.