CVE-2015-6838
PHP libxml2 NULL Pointer Dereference Denial of Service
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.
INFO
Published Date :
May 16, 2016, 10:59 a.m.
Last Modified :
Nov. 7, 2023, 2:27 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2015-6838.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-6838 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-6838 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Source Update by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Changed Source SUSE OpenText -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference OpenText http://www.securitytracker.com/id/1033548 [No types assigned] Added Reference OpenText https://bugs.php.net/bug.php?id=69782 [No types assigned] Added Reference OpenText http://php.net/ChangeLog-5.php [No types assigned] Added Reference OpenText http://www.securityfocus.com/bid/76733 [No types assigned] Added Reference OpenText http://www.debian.org/security/2015/dsa-3358 [No types assigned] Added Reference OpenText https://security.gentoo.org/glsa/201606-10 [No types assigned] Removed Reference SUSE https://bugs.php.net/bug.php?id=69782 Removed Reference SUSE http://php.net/ChangeLog-5.php Removed Reference SUSE http://www.securityfocus.com/bid/76733 Removed Reference SUSE https://security.gentoo.org/glsa/201606-10 Removed Reference SUSE http://www.securitytracker.com/id/1033548 Removed Reference SUSE http://www.debian.org/security/2015/dsa-3358 -
CVE Modified by [email protected]
Nov. 04, 2017
Action Type Old Value New Value Added Reference http://www.debian.org/security/2015/dsa-3358 [No Types Assigned] -
CVE Modified by [email protected]
Sep. 17, 2017
Action Type Old Value New Value Added Reference http://www.securitytracker.com/id/1033548 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 30, 2016
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/201606-10 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 28, 2016
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/76733 [No Types Assigned] -
Modified Analysis by [email protected]
May. 18, 2016
Action Type Old Value New Value Added Evaluator Description <a href="http://cwe.mitre.org/data/definitions/476.html">CWE-476: NULL Pointer Dereference</a> Added CPE Configuration Configuration 1 AND OR *cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:* OR *cpe:2.3:a:xmlsoft:libxml2:2.9.1:*:*:*:*:*:*:* (and previous) Configuration 2 AND OR *cpe:2.3:a:php:php:5.5.28:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.17:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.16:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.15:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.9:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.8:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.7:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.6:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.5:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.4:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.3:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.27:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.26:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.25:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.24:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.23:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.22:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.21:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.20:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.2:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.19:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.18:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.14:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.13:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.12:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.11:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.10:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.1:*:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:rc2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:rc1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:beta1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha6:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha5:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha4:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha3:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha2:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:alpha1:*:*:*:*:*:* *cpe:2.3:a:php:php:5.5.0:*:*:*:*:*:*:* OR *cpe:2.3:a:xmlsoft:libxml2:2.9.1:*:*:*:*:*:*:* (and previous) Configuration 3 AND OR *cpe:2.3:a:php:php:5.4.44:*:*:*:*:*:*:* (and previous) OR *cpe:2.3:a:xmlsoft:libxml2:2.9.1:*:*:*:*:*:*:* (and previous) Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://bugs.php.net/bug.php?id=69782 No Types Assigned https://bugs.php.net/bug.php?id=69782 Exploit Added CWE NVD-CWE-Other -
CVE Translated by [email protected]
May. 18, 2016
Action Type Old Value New Value Removed Translation La función xsl_function_php en ext/xsl/xsl/xsltprocessor.c en PHP en versiones anteriores a 5.4.45, 5.5.x en versiones anteriores a 5.5.29 y 5.6.x en versiones anteriores a 5.6.13, cuando se utiliza libxml2 en versiones anteriores a 2.9.2, no considera la posibilidad de un NULL valuePop antes de proceder a una operación libre despues del bucle principal de razonamiento, lo que permite a atacantes remotos provocar una denegación de servicio (en referencia a un puntero NULL y caída de aplicación) a través de un documento XML manipulado, una vulnerabilidad diferente a CVE-2015-6838. Added Translation La función xsl_function_php en ext/xsl/xsl/xsltprocessor.c en PHP en versiones anteriores a 5.4.45, 5.5.x en versiones anteriores a 5.5.29 y 5.6.x en versiones anteriores a 5.6.13, cuando se utiliza libxml2 en versiones anteriores a 2.9.2, no considera la posibilidad de un retorno NULL valuePop antes de proceder a una operación libre despues del bucle del argumento principal, lo que permite a atacantes remotos provocar una denegación de servicio (referencia a puntero NULL y caída de aplicación) a través de un documento XML manipulado, una vulnerabilidad diferente a CVE-2015-6838. -
Initial Analysis by [email protected]
May. 17, 2016
Action Type Old Value New Value
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-6838 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2015-6838
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
2.78 }} -0.79%
score
0.89492
percentile