libxml2 prior 7 Hash Collision Form Parameter Parser resource management

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in libxml2. This affects an unknown function of the component Hash Collision Form Parameter Parser. The manipulation leads to resource management. This vulnerability is documented as CVE-2012-0841. There is not any exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in libxml2 (Document Processing Software). It has been rated as critical. This issue affects some unknown processing of the component Hash Collision Form Parameter Parser. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

libxml2 before 2.8.0 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted XML data.

The weakness was released 02/21/2012 by Juraj Somorovsky (Website). The advisory is shared at debian.org. The identification of this vulnerability is CVE-2012-0841 since 01/19/2012. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 69659 (Amazon Linux AMI : libxml2 (ALAS-2012-52)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 216039 (VMWare ESXi 4.0.0 Patch Release ESXi400-201209001 Missing (KB2019662)).

Upgrading to version 7 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. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (69659), SecurityFocus (BID 52107†), OSVDB (79437†), Secunia (SA48000†) and SecurityTracker (ID 1026723†). Entries connected to this vulnerability are available at VDB-4214, VDB-4462, VDB-4520 and VDB-6351. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69659
Nessus Name: Amazon Linux AMI : libxml2 (ALAS-2012-52)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 71143
OpenVAS Name: Debian Security Advisory DSA 2417-1 (libxml2)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: libxml2 7
Patch: git.gnome.org

Timelineinfo

01/19/2012 🔍
02/21/2012 +33 days 🔍
02/21/2012 +0 days 🔍
02/21/2012 +0 days 🔍
02/22/2012 +1 days 🔍
02/24/2012 +2 days 🔍
12/21/2012 +301 days 🔍
09/04/2013 +257 days 🔍
07/15/2018 +1775 days 🔍

Sourcesinfo

Advisory: debian.org
Researcher: Juraj Somorovsky
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-0841 (🔍)
GCVE (CVE): GCVE-0-2012-0841
GCVE (VulDB): GCVE-100-4661

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 52107 - libxml2 Hash Collision Denial Of Service Vulnerability
Secunia: 48000 - libxml2 Denial of Service and Buffer Underflow Vulnerabilities, Highly Critical
OSVDB: 79437
SecurityTracker: 1026723

See also: 🔍

Entryinfo

Created: 02/24/2012 01:00
Updated: 07/15/2018 16:16
Changes: 02/24/2012 01:00 (77), 07/15/2018 16:16 (4)
Complete: 🔍
Cache ID: 216:0EA:103

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