VDB-10595 · OSVDB 98109 · GCVE-100-10595

libxml2 xmlregexp.c xmlFARegExecRollBack 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

Summaryinfo

A vulnerability marked as problematic has been reported in libxml2. This affects the function xmlFARegExecRollBack of the file xmlregexp.c. The manipulation leads to null pointer dereference. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, has been found in libxml2 (Document Processing Software) (the affected version is unknown). This issue affects the function xmlFARegExecRollBack of the file xmlregexp.c. The manipulation 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 weakness was published 09/11/2013 by Gaurav Gupta with Samsung as Bug 707749 - NULL pointer dereferenced in xmlregexp.c as confirmed advisory (Website). It is possible to read the advisory at bugzilla.gnome.org. The public release has been coordinated with the project team. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

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.

The vulnerability is also documented in the vulnerability database at OSVDB (98109†). Similar entries are available at VDB-10593 and VDB-10594. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Document Processing Software

Name

libxml2

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

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

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

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

Physical: No
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: 🔍

GCVE (VulDB): GCVE-100-10595
OSVDB: 98109

See also: 🔍

Entryinfo

Created: 10/08/2013 12:51
Updated: 03/24/2019 17:23
Changes: 10/08/2013 12:51 (46), 03/24/2019 17:23 (2)
Complete: 🔍
Committer:
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.