VDB-10593 · OSVDB 98107

libxml2 xmlregexp.c xmlRegExecGetValues null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

A vulnerability classified as critical has been found in libxml2 (Document Processing Software) (affected version not known). This affects the function xmlRegExecGetValues of the file xmlregexp.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability.

The weakness was presented 09/11/2013 by Gaurav Gupta with Samsung as Bug 707749 - NULL pointer dereferenced in xmlregexp.c as confirmed advisory (Website). The advisory is shared at bugzilla.gnome.org. The public release was coordinated in cooperation with the project team. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

Applying the patch Fix potential NULL pointer dereferences in regexp code is able to eliminate this problem. The bugfix is ready for download at git.gnome.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

See 10594 and 10595 for similar entries.

Productinfo

Type

Document Processing Software

Name

libxml2

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: Fix potential NULL pointer dereferences in regexp code

Timelineinfo

09/11/2013 🔍
09/11/2013 +0 days 🔍
10/08/2013 +27 days 🔍
03/24/2019 +1993 days 🔍

Sourcesinfo

Advisory: Bug 707749 - NULL pointer dereferenced in xmlregexp.c
Researcher: Gaurav Gupta
Organization: Samsung
Status: Confirmed
Coordinated: 🔍
OSVDB: 98107

See also: 🔍

Entryinfo

Created: 10/08/2013 12:37
Updated: 03/24/2019 17:27
Changes: 10/08/2013 12:37 (47), 03/24/2019 17:27 (2)
Complete: 🔍