Linux Foundation Xen up to 4.2.3 HVM Passthrough libxl access control

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Foundation Xen up to 4.2.3 and classified as critical. Affected is an unknown function in the library libxl of the component HVM Passthrough. Performing a manipulation results in access control. This vulnerability is identified as CVE-2013-4329. There is not any exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as critical has been found in Linux Foundation Xen up to 4.2.3 (Virtualization Software). This affects an unknown part in the library libxl of the component HVM Passthrough. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

The xenlight library (libxl) in Xen 4.0.x through 4.2.x, when IOMMU is disabled, provides access to a busmastering-capable PCI passthrough device before the IOMMU setup is complete, which allows local HVM guest domains to gain privileges or cause a denial of service via a DMA instruction.

The weakness was released 09/10/2013 by George Dunlap as not defined mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2013-4329 since 06/12/2013. Attacking locally is a requirement. A authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 69967 (Fedora 18 : xen-4.2.3-1.fc18 (2013-16371)), 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 166813 (SUSE Enterprise Linux Security Update for Xen (SUSE-SU-2014:0446-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (69967), SecurityFocus (BID 62307†), OSVDB (97159†), Secunia (SA54593†) and Vulnerability Center (SBV-41486†). Entries connected to this vulnerability are available at VDB-8812, VDB-9254, VDB-9273 and VDB-10504. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
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: 69967
Nessus Name: Fedora 18 : xen-4.2.3-1.fc18 (2013-16371)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 866910
OpenVAS Name: Fedora Update for xen FEDORA-2013-16357
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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Timelineinfo

06/12/2013 🔍
09/10/2013 +90 days 🔍
09/10/2013 +0 days 🔍
09/10/2013 +0 days 🔍
09/10/2013 +0 days 🔍
09/11/2013 +1 days 🔍
09/12/2013 +1 days 🔍
09/12/2013 +0 days 🔍
09/12/2013 +0 days 🔍
09/19/2013 +7 days 🔍
05/24/2021 +2804 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: seclists.org
Researcher: George Dunlap
Status: Not defined

CVE: CVE-2013-4329 (🔍)
GCVE (CVE): GCVE-0-2013-4329
GCVE (VulDB): GCVE-100-10251

OVAL: 🔍

SecurityFocus: 62307 - Xen CVE-2013-4329 Local Privilege Escalation Vulnerability
Secunia: 54593 - Xen libxl HVM PCI Passthrough Weakness, Not Critical
OSVDB: 97159
Vulnerability Center: 41486 - XenSource Xen Server 4.2 Local Code Execution and Denial of Service due to a Flaw in the PCI PassThrough Devices Setup, Medium

See also: 🔍

Entryinfo

Created: 09/12/2013 18:51
Updated: 05/24/2021 14:58
Changes: 09/12/2013 18:51 (79), 05/11/2017 08:43 (4), 05/24/2021 14:58 (3)
Complete: 🔍
Committer:
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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