XMLSoft libxslt up to 1.0.28 keys.c xsltDocumentFunction uninitialized null pointer dereference

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5.1	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in XMLSoft libxslt up to 1.0.28. Affected by this issue is the function xsltDocumentFunction of the file keys.c of the component libxslt. The manipulation of the argument uninitialized leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2012-6139. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in XMLSoft libxslt up to 1.0.28 and classified as problematic. This issue affects the function xsltDocumentFunction of the file keys.c of the component libxslt. The manipulation of the argument uninitialized with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

libxslt before 1.1.28 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an (1) empty match attribute in a XSL key to the xsltAddKey function in keys.c or (2) uninitialized variable to the xsltDocumentFunction function in functions.c.

The weakness was disclosed 04/12/2013 as confirmed git commit (GIT Repository). The advisory is shared at git.gnome.org. The identification of this vulnerability is CVE-2012-6139 since 12/06/2012. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 74951 (openSUSE Security Update : libxslt (openSUSE-SU-2013:0585-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166564 (SUSE Enterprise Linux Security update for libxslt (SUSE-SU-2013:1656-1)).

Upgrading to version 1.0.29 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.gnome.org. The best possible mitigation is suggested to be patching the affected component.

The vulnerability is also documented in the databases at X-Force (83038), Tenable (74951), Secunia (SA52745†) and Vulnerability Center (SBV-39059†). The entry VDB-65772 is pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• XMLSoft

Name

• libxslt

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.0.10
• 1.0.11
• 1.0.12
• 1.0.13
• 1.0.14
• 1.0.15
• 1.0.16
• 1.0.17
• 1.0.18
• 1.0.19
• 1.0.20
• 1.0.21
• 1.0.22
• 1.0.23
• 1.0.24
• 1.0.25
• 1.0.26
• 1.0.27
• 1.0.28

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 74951
Nessus Name: openSUSE Security Update : libxslt (openSUSE-SU-2013:0585-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892654
OpenVAS Name: Debian Security Advisory DSA 2654-1 (libxslt - denial of service
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Upgrade: libxslt 1.0.29
Patch: git.gnome.org

Timelineinfo

10/02/2012 🔍
12/06/2012 +65 days 🔍
04/02/2013 +117 days 🔍
04/09/2013 +7 days 🔍
04/12/2013 +3 days 🔍
04/12/2013 +0 days 🔍
06/13/2014 +427 days 🔍
03/24/2015 +284 days 🔍
01/02/2022 +2476 days 🔍

Sourcesinfo

Advisory: USN-1784-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-6139 (🔍)
GCVE (CVE): GCVE-0-2012-6139
GCVE (VulDB): GCVE-100-63977

OVAL: 🔍

X-Force: 83038
Secunia: 52745 - Ubuntu update for libxslt, Less Critical
SecurityTracker: 1028338
Vulnerability Center: 39059 - Libxslt <1.1.28 Remote Denial of Service due to an Error in xsltAddKey and xsltDocumentFunction, Medium

See also: 🔍

Entryinfo

Created: 03/24/2015 15:54
Updated: 01/02/2022 09:15
Changes: 03/24/2015 15:54 (68), 04/26/2017 23:53 (11), 01/02/2022 09:13 (4), 01/02/2022 09:15 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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