Citrix Xen 4.1.0/4.1.1/4.1.2/4.1.3/4.2.0 PV Domain Builder input validation

CVSS Meta Temp Score
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5.3$0-$5k0.00

A vulnerability was found in Citrix Xen 4.1.0/4.1.1/4.1.2/4.1.3/4.2.0 (Connectivity Software) and classified as problematic. Affected by this issue is an unknown function of the component PV Domain Builder. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk (1) before or (2) after decompression, which allows local guest administrators to cause a denial of service (domain 0 memory consumption) via a crafted (a) kernel or (b) ramdisk.

The weakness was presented 10/26/2012 as 51071 as confirmed advisory (Secunia). The advisory is available at secunia.com. The vendor was not involved in the coordination of the public release. This vulnerability is handled as CVE-2012-4544 since 08/21/2012. The exploitation is known to be easy. Local access is required to approach this attack. The successful exploitation requires a simple authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 68725 (Oracle Linux 5 : xen (ELSA-2013-0241)), 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 166818 (SUSE Enterprise Linux Security Update for Xen (SUSE-SU-2014:0411-1)).

Applying the patch xsa25 is able to eliminate this problem. The bugfix is ready for download at openwall.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (79617) and Tenable (68725). See 8178 and 8473 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68725
Nessus Name: Oracle Linux 5 : xen (ELSA-2013-0241)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892636
OpenVAS Name: Debian Security Advisory DSA 2636-2 (xen - several vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
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Patch: xsa25

Timelineinfo

08/21/2012 🔍
10/26/2012 +66 days 🔍
10/26/2012 +0 days 🔍
10/26/2012 +0 days 🔍
10/26/2012 +0 days 🔍
10/26/2012 +0 days 🔍
10/26/2012 +0 days 🔍
10/29/2012 +3 days 🔍
10/31/2012 +2 days 🔍
11/15/2012 +15 days 🔍
07/12/2013 +239 days 🔍
04/18/2021 +2837 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: 51071⛔
Status: Confirmed

CVE: CVE-2012-4544 (🔍)
OVAL: 🔍

X-Force: 79617
SecurityTracker: 1027699 - Xen Doman Builder Size Validation Bug Lets Local Guest Administrators Denial of Service
Vulnerability Center: 37246 - Xen <=4.2 PV Domain Builder Error Allows Local Guest Administrators to Cause DoS, Low
SecurityFocus: 56289 - Xen PV Domain Builder Kernel Decompression Local Denial Of Service Vulnerability
Secunia: 51071 - Xen PV Domain Builder Kernel Decompression Denial of Service Vulnerability, Not Critical
OSVDB: 86619

See also: 🔍

Entryinfo

Created: 10/29/2012 11:38
Updated: 04/18/2021 16:38
Changes: 10/29/2012 11:38 (84), 04/21/2017 11:33 (7), 04/18/2021 16:38 (3)
Complete: 🔍
Committer: olku

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