Linux Kernel 3.8.0/3.8.1/3.8.2/3.8.3/3.8.4 arch/x86/kvm/x86.c kvm_set_msr_common memory corruption

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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 3.8.0/3.8.1/3.8.2/3.8.3/3.8.4. It has been classified as problematic. The affected element is the function kvm_set_msr_common of the file arch/x86/kvm/x86.c. The manipulation leads to memory corruption. This vulnerability is traded as CVE-2013-1796. There is no exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Linux Kernel 3.8.0/3.8.1/3.8.2/3.8.3/3.8.4 (Operating System) and classified as critical. This issue affects the function kvm_set_msr_common of the file arch/x86/kvm/x86.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 kvm_set_msr_common function in arch/x86/kvm/x86.c in the Linux kernel through 3.8.4 does not ensure a required time_page alignment during an MSR_KVM_SYSTEM_TIME operation, which allows guest OS users to cause a denial of service (buffer overflow and host OS memory corruption) or possibly have unspecified other impact via a crafted application.

The weakness was shared 03/01/2013 by Andrew Honig with Google Inc. as not defined mailinglist post (oss-sec). The advisory is shared at seclists.org. The vendor cooperated in the coordination of the public release. The identification of this vulnerability is CVE-2013-1796 since 02/19/2013. The exploitation is known to be difficult. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 68804 (Oracle Linux 5 : kvm (ELSA-2013-0727)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166437 (OpenSuSE Security Update for 3.0.80 Kernel Update (openSUSE-SU-2013:1187-1)).

Upgrading to version 2.6.32.61 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (68804), SecurityFocus (BID 58597†), OSVDB (91563†), Secunia (SA52630†) and Vulnerability Center (SBV-38857†). The entries VDB-7779, VDB-7812, VDB-8067 and VDB-8068 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.4
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp 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: 68804
Nessus Name: Oracle Linux 5 : kvm (ELSA-2013-0727)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892668
OpenVAS Name: Debian Security Advisory DSA 2668-1 (linux-2.6 - privilege escalation/denial of service/information leak
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: Kernel 2.6.32.61
Patch: git.kernel.org

Timelineinfo

02/19/2013 🔍
03/01/2013 +10 days 🔍
03/19/2013 +18 days 🔍
03/20/2013 +1 days 🔍
03/20/2013 +0 days 🔍
03/21/2013 +1 days 🔍
03/21/2013 +0 days 🔍
03/22/2013 +1 days 🔍
03/25/2013 +3 days 🔍
07/12/2013 +109 days 🔍
05/06/2021 +2855 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: Andrew Honig
Organization: Google Inc.
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-1796 (🔍)
GCVE (CVE): GCVE-0-2013-1796
GCVE (VulDB): GCVE-100-8069

OVAL: 🔍

SecurityFocus: 58597 - Linux Kernel Netlink Interface Multiple Information Disclosure Vulnerabilities
Secunia: 52630 - KVM Multiple Vulnerabilities, Less Critical
OSVDB: 91563
Vulnerability Center: 38857 - Linux Kernel Remote Buffer Overflow Vulnerability Which Affects the KVM - CVE-2013-1796, Critical

See also: 🔍

Entryinfo

Created: 03/25/2013 15:20
Updated: 05/06/2021 14:45
Changes: 03/25/2013 15:20 (85), 04/26/2017 17:35 (4), 05/06/2021 14:45 (3)
Complete: 🔍
Committer:
Cache ID: 216:A63:103

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