libxml2 up to 2.9.3 parser.c xmlParseElementDecl memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in libxml2 up to 2.9.3. This affects the function xmlParseElementDecl of the file parser.c. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2016-4447. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in libxml2 up to 2.9.3 (Document Processing Software). It has been rated as very critical. This issue affects the function xmlParseElementDecl of the file parser.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The xmlParseElementDecl function in parser.c in libxml2 before 2.9.4 allows context-dependent attackers to cause a denial of service (heap-based buffer underread and application crash) via a crafted file, involving xmlParseName.

The weakness was released 06/09/2016 (Website). The advisory is shared at debian.org. The identification of this vulnerability is CVE-2016-4447 since 05/02/2016. 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 price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/23/2022).

The vulnerability scanner Nessus provides a plugin with the ID 91447 (Debian DSA-3593-1 : libxml2 - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43650 (Juniper Junos Multiple vulnerabilities in libxml2 (JSA10916)).

Upgrading to version 2.9.4 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (91447) and SecurityFocus (BID 90864†). Entries connected to this vulnerability are available at VDB-79335, VDB-79336, VDB-79337 and VDB-79338. 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: 8.7
VulDB Meta Temp Score: 8.5

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 91447
Nessus Name: Debian DSA-3593-1 : libxml2 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-719
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libxml2 2.9.4
Patch: git.gnome.org

Timelineinfo

05/02/2016 🔍
05/23/2016 +21 days 🔍
06/02/2016 +10 days 🔍
06/03/2016 +1 days 🔍
06/09/2016 +6 days 🔍
06/09/2016 +0 days 🔍
06/10/2016 +1 days 🔍
08/23/2022 +2265 days 🔍

Sourcesinfo

Advisory: RHSA-2016:1292
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4447 (🔍)
GCVE (CVE): GCVE-0-2016-4447
GCVE (VulDB): GCVE-100-87821

OVAL: 🔍

SecurityFocus: 90864 - Libxml2 'xmlParseName' CVE-2016-4447 Remote Denial of Service Vulnerability
SecurityTracker: 1036348

See also: 🔍

Entryinfo

Created: 06/10/2016 09:39
Updated: 08/23/2022 10:44
Changes: 06/10/2016 09:39 (61), 01/14/2019 08:03 (19), 08/23/2022 10:44 (5)
Complete: 🔍
Cache ID: 216:C8F:103

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