Linux Kernel 3.12.5 kvm/lapic.c kvm_lapic_sync_from_vapic/kvm_lapic_sync_to_vapic vapic_addr input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel 3.12.5. This vulnerability affects the function kvm_lapic_sync_from_vapic/kvm_lapic_sync_to_vapic of the file kvm/lapic.c. This manipulation of the argument vapic_addr causes input validation. The identification of this vulnerability is CVE-2013-6368. There is no exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Linux Kernel 3.12.5 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function kvm_lapic_sync_from_vapic/kvm_lapic_sync_to_vapic of the file kvm/lapic.c. The manipulation of the argument vapic_addr with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

The KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges or cause a denial of service (system crash) via a VAPIC synchronization operation involving a page-end address.

The weakness was shared 12/12/2013 by Andrew Honig as Convert vapic synchronization to _cached functions as not defined git commit (GIT Repository). The advisory is shared at github.com. This vulnerability is known as CVE-2013-6368 since 11/04/2013. The exploitation appears to be difficult. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 71379 (CentOS 6 : kernel (CESA-2013:1801)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169706 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2017:0437-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (71379), SecurityFocus (BID 64291†), OSVDB (100986†) and Vulnerability Center (SBV-42584†). The entries VDB-69017, VDB-94691 and VDB-94739 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71379
Nessus Name: CentOS 6 : kernel (CESA-2013:1801)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 881832
OpenVAS Name: CentOS Update for kernel CESA-2013:1801 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Patch: github.com

Timelineinfo

11/04/2013 🔍
12/12/2013 +37 days 🔍
12/12/2013 +0 days 🔍
12/12/2013 +0 days 🔍
12/12/2013 +0 days 🔍
12/14/2013 +2 days 🔍
12/16/2013 +2 days 🔍
12/16/2013 +0 days 🔍
06/04/2021 +2727 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Convert vapic synchronization to _cached functions
Researcher: Andrew Honig
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-6368 (🔍)
GCVE (CVE): GCVE-0-2013-6368
GCVE (VulDB): GCVE-100-11509

OVAL: 🔍

SecurityFocus: 64291
OSVDB: 100986
Vulnerability Center: 42584 - Linux Kernel <=3.12.5 KVM Local Privilege Escalation or DoS via Cross Page VAPIC Address, Medium

See also: 🔍

Entryinfo

Created: 12/16/2013 11:28
Updated: 06/04/2021 11:24
Changes: 12/16/2013 11:28 (76), 05/17/2017 09:09 (2), 06/04/2021 11:16 (4), 06/04/2021 11:24 (1)
Complete: 🔍
Committer: olku
Cache ID: 216:351:103

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