Linux Kernel 3.4/3.4.1/3.4.2/3.4.3/3.4.4 macvtap Device Driver experimental_zcopytx memory corruption

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8.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 3.4/3.4.1/3.4.2/3.4.3/3.4.4. The affected element is the function experimental_zcopytx of the component macvtap Device Driver. Performing a manipulation results in memory corruption. This vulnerability was named CVE-2012-2119. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel 3.4/3.4.1/3.4.2/3.4.3/3.4.4 (Operating System). This affects the function experimental_zcopytx of the component macvtap Device Driver. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in the macvtap device driver in the Linux kernel before 3.4.5, when running in certain configurations, allows privileged KVM guest users to cause a denial of service (crash) via a long descriptor with a long vector length.

The weakness was presented 06/19/2012 by Petr Matousek (Website). It is possible to read the advisory at lists.opensuse.org. The public release was coordinated in cooperation with Linux. This vulnerability is uniquely identified as CVE-2012-2119 since 04/04/2012. Attacking locally is a requirement. A authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 58836 (Fedora 17 : kernel-3.3.2-8.fc17 (2012-6344)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166480 (OpenSuSE Security Update for kernel (openSUSE-SU-2013:0925-1)).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (75046), Tenable (58836), SecurityFocus (BID 53165†), OSVDB (83105†) and Secunia (SA49625†). Further details are available at rhn.redhat.com. See VDB-5571, VDB-5582, VDB-7842 and VDB-7994 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 58836
Nessus Name: Fedora 17 : kernel-3.3.2-8.fc17 (2012-6344)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 881125
OpenVAS Name: CentOS Update for kernel CESA-2012:0743 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/04/2012 🔍
04/19/2012 +15 days 🔍
04/19/2012 +0 days 🔍
04/22/2012 +3 days 🔍
04/24/2012 +2 days 🔍
06/19/2012 +56 days 🔍
06/20/2012 +1 days 🔍
06/27/2012 +7 days 🔍
01/22/2013 +209 days 🔍
03/25/2021 +2984 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: lists.opensuse.org
Researcher: Petr Matousek
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-2119 (🔍)
GCVE (CVE): GCVE-0-2012-2119
GCVE (VulDB): GCVE-100-5583

OVAL: 🔍

X-Force: 75046
SecurityFocus: 53165 - MacVTap Device Driver Local Stack Buffer Overflow Vulnerability
Secunia: 49625 - Red Hat update for kernel, Less Critical
OSVDB: 83105
Vulnerability Center: 34925 - Linux Kernel MacVTap Device Local Stack-Based Buffer-Overflow Allows Arbitrary Code Execution, High

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/27/2012 10:38
Updated: 03/25/2021 18:16
Changes: 06/27/2012 10:38 (74), 04/11/2017 10:54 (11), 03/25/2021 18:16 (3)
Complete: 🔍
Cache ID: 216:2BA:103

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