Linux Foundation Xen 4.4.0 on 64-bit ARM 32-bit Userspace access control

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Foundation Xen 4.4.0 on 64-bit ARM. This affects an unknown part of the component 32-bit Userspace Handler. Performing a manipulation results in access control. This vulnerability is identified as CVE-2014-5147. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Foundation Xen 4.4.0 on 64-bit ARM (Virtualization Software). This affects some unknown processing of the component 32-bit Userspace Handler. 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 availability. The summary by CVE is:

Xen 4.4.x, when running a 64-bit kernel on an ARM system, does not properly handle traps from the guest domain that use a different address width, which allows local guest users to cause a denial of service (host crash) via a crafted 32-bit process.

The weakness was released 08/12/2014 by Riku Voipio as XSA-102 as confirmed advisory (Website). It is possible to read the advisory at xenbits.xenproject.org. This vulnerability is uniquely identified as CVE-2014-5147 since 07/30/2014. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xenproject.org. It is possible to mitigate the problem by applying the configuration setting CONFIG_COMPAT=n. The best possible mitigation is suggested to be patching the affected component. The advisory contains the following remark:

32-bit ARM systems and and X86 systems are not vulnerable.

The vulnerability is also documented in the databases at X-Force (95232), SecurityFocus (BID 69189†), SecurityTracker (ID 1030724†) and Vulnerability Center (SBV-45960†). Entries connected to this vulnerability are available at VDB-67314, VDB-67313 and VDB-67312. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.4

VulDB Base Score: 6.2
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: xenbits.xenproject.org
Config: CONFIG_COMPAT=n

Timelineinfo

07/30/2014 🔍
08/12/2014 +13 days 🔍
08/12/2014 +0 days 🔍
08/12/2014 +0 days 🔍
08/13/2014 +1 days 🔍
08/13/2014 +0 days 🔍
08/29/2014 +16 days 🔍
08/31/2014 +2 days 🔍
06/05/2017 +1009 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: XSA-102
Researcher: Riku Voipio
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-5147 (🔍)
GCVE (CVE): GCVE-0-2014-5147
GCVE (VulDB): GCVE-100-67311
X-Force: 95232 - Xen traps denial of service, Medium Risk
SecurityFocus: 69189 - Xen CVE-2014-5147 Local Denial of Service Vulnerability
SecurityTracker: 1030724 - Xen Trap Handling Flaw Lets Local Guest System Users Deny Service on the Host System
Vulnerability Center: 45960 - Xen 4.4.x Remote DoS via a Crafted 32-bit Process, Medium

See also: 🔍

Entryinfo

Created: 08/13/2014 10:39
Updated: 06/05/2017 10:41
Changes: 08/13/2014 10:39 (75), 06/05/2017 10:41 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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