Linux Foundation Xen up to 4.3.1 Permission Check Dereferrer VMLAUNCH/VMRESUME input validation

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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Foundation Xen up to 4.3.1. It has been declared as problematic. Affected is the function VMLAUNCH/VMRESUME of the component Permission Check Dereferrer. Executing a manipulation can lead to input validation. The identification of this vulnerability is CVE-2013-4551. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in Linux Foundation Xen up to 4.3.1 (Virtualization Software) and classified as problematic. This vulnerability affects the function VMLAUNCH/VMRESUME of the component Permission Check Dereferrer. The manipulation 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. CVE summarizes:

Xen 4.2.x and 4.3.x, when nested virtualization is disabled, does not properly check the emulation paths for (1) VMLAUNCH and (2) VMRESUME, which allows local HVM guest users to cause a denial of service (host crash) via unspecified vectors related to "guest VMX instruction execution."

The weakness was shared 11/08/2013 by Jeff Zimmermann as Xen Security Advisory 75 - Host crash due to guest VMX instruction execution as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. The vendor cooperated in the coordination of the public release. This vulnerability was named CVE-2013-4551 since 06/12/2013. The attack needs to be approached locally. 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 70911 (Fedora 20 : xen-4.3.1-2.fc20 (2013-21000)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166935 (OpenSuSE Security Update for xen (openSUSE-SU-2014:0483-1)).

Applying the patch Xen Security Advisory 75 - Host crash due to guest VMX instruction execution is able to eliminate this problem. The bugfix is ready for download at seclists.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (88649), Tenable (70911), SecurityFocus (BID 63625†), OSVDB (99680†) and Secunia (SA55398†). Additional details are provided at seclists.org. The entries VDB-12064, VDB-12235, VDB-12236 and VDB-12339 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
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Nessus ID: 70911
Nessus Name: Fedora 20 : xen-4.3.1-2.fc20 (2013-21000)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 867075
OpenVAS Name: Fedora Update for xen FEDORA-2013-21041
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: Xen Security Advisory 75 - Host crash due to guest VMX instruction execution

Timelineinfo

06/12/2013 🔍
11/08/2013 +149 days 🔍
11/08/2013 +0 days 🔍
11/08/2013 +0 days 🔍
11/14/2013 +6 days 🔍
11/15/2013 +1 days 🔍
11/17/2013 +2 days 🔍
11/25/2013 +8 days 🔍
06/02/2021 +2746 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: Xen Security Advisory 75 - Host crash due to guest VMX instruction execution
Researcher: Jeff Zimmermann
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-4551 (🔍)
GCVE (CVE): GCVE-0-2013-4551
GCVE (VulDB): GCVE-100-11164

OVAL: 🔍

X-Force: 88649
SecurityFocus: 63625
Secunia: 55398 - Xen HVM Guest VMLAUNCH / VMRESUME Denial of Service Vulnerability, Not Critical
OSVDB: 99680
SecurityTracker: 1029313
Vulnerability Center: 42359 - XenSource Xen 4.2.* and 4.3.* Local Denial of Service Related to Guest VMX Instruction Execution, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 11/15/2013 15:29
Updated: 06/02/2021 08:50
Changes: 11/15/2013 15:29 (84), 05/15/2017 11:54 (1), 06/02/2021 08:47 (2), 06/02/2021 08:50 (1)
Complete: 🔍
Committer:
Cache ID: 216::103

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