Xmlsoft libxml2 2.9.2 xmlDictComputeFastQKey memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Xmlsoft libxml2 2.9.2. This issue affects the function xmlDictComputeFastQKey. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2015-7497. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Xmlsoft libxml2 2.9.2 (Document Processing Software). This vulnerability affects the function xmlDictComputeFastQKey. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in the xmlDictComputeFastQKey function in dict.c in libxml2 before 2.9.3 allows context-dependent attackers to cause a denial of service via unspecified vectors.

The weakness was released 11/25/2015 by Kostya Serebryany with Google (Website). The advisory is shared for download at git.gnome.org. This vulnerability was named CVE-2015-7497 since 09/29/2015. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 87354 (Amazon Linux AMI : libxml2 (ALAS-2015-628)), 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 351588 (Amazon Linux Security Advisory for libxml2: ALAS2-2019-1220).

Upgrading to version 2.9.3 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (108320), Tenable (87354), SecurityFocus (BID 79508†) and Vulnerability Center (SBV-54848†). Entries connected to this vulnerability are available at VDB-77250, VDB-79257, VDB-79258 and VDB-79334. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87354
Nessus Name: Amazon Linux AMI : libxml2 (ALAS-2015-628)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703430
OpenVAS Name: Debian Security Advisory DSA 3430-1 (libxml2 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: libxml2 2.9.3
Patch: git.gnome.org

Timelineinfo

09/29/2015 🔍
11/25/2015 +57 days 🔍
11/25/2015 +0 days 🔍
11/26/2015 +1 days 🔍
12/08/2015 +12 days 🔍
12/14/2015 +6 days 🔍
12/15/2015 +1 days 🔍
12/15/2015 +0 days 🔍
12/15/2015 +0 days 🔍
06/28/2022 +2387 days 🔍

Sourcesinfo

Advisory: USN-2834-1
Researcher: Kostya Serebryany
Organization: Google
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7497 (🔍)
GCVE (CVE): GCVE-0-2015-7497
GCVE (VulDB): GCVE-100-79336

OVAL: 🔍

X-Force: 108320 - Libxml2 xmlDictComputeFastQKey() denial of service
SecurityFocus: 79508 - Libxml2 'xmlDictComputeFastQKey()' Function Denial of Service Vulnerability
SecurityTracker: 1034243
Vulnerability Center: 54848 - Libxml2 Remote DoS due to Buffer Overflow in XmlDictComputeFastQKey, Medium

See also: 🔍

Entryinfo

Created: 11/26/2015 11:48
Updated: 06/28/2022 07:45
Changes: 11/26/2015 11:48 (69), 05/11/2018 13:07 (14), 06/28/2022 07:40 (5), 06/28/2022 07:45 (1)
Complete: 🔍
Cache ID: 216:DF6:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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