Xen up to 4.10.x PV MMU Preemption resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Xen 4.6.x/4.7.x/4.8.x/4.9.x/4.10.x. Affected is an unknown function of the component PV MMU Preemption. The manipulation leads to resource management. This vulnerability is traded as CVE-2018-12891. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Xen 4.6.x/4.7.x/4.8.x/4.9.x/4.10.x (Virtualization Software) and classified as critical. This issue affects some unknown processing of the component PV MMU Preemption. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability.

The bug was discovered 06/27/2018. The weakness was shared 06/27/2018 by Jan Beulich as XSA-264 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. The identification of this vulnerability is CVE-2018-12891 since 06/26/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 111348 (SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:2059-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176820 (Debian Security Update for xen (DLA 1577-1)).

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

The vulnerability is also documented in the databases at Tenable (111348), SecurityFocus (BID 104570†) and SecurityTracker (ID 1041201†). The entries VDB-119508, VDB-120120 and VDB-120147 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 111348
Nessus Name: SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:2059-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xenbits.xen.org

Timelineinfo

06/26/2018 🔍
06/27/2018 +1 days 🔍
06/27/2018 +0 days 🔍
06/27/2018 +0 days 🔍
06/27/2018 +0 days 🔍
06/28/2018 +1 days 🔍
07/01/2018 +3 days 🔍
07/02/2018 +0 days 🔍
07/26/2018 +24 days 🔍
03/29/2023 +1707 days 🔍

Sourcesinfo

Advisory: XSA-264
Researcher: Jan Beulich
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-12891 (🔍)
GCVE (CVE): GCVE-0-2018-12891
GCVE (VulDB): GCVE-100-120119

OVAL: 🔍

SecurityFocus: 104570 - Xen CVE-2018-12891 Local Denial of Service Vulnerability
SecurityTracker: 1041201

See also: 🔍

Entryinfo

Created: 07/01/2018 10:56
Updated: 03/29/2023 14:24
Changes: 07/01/2018 10:56 (80), 02/23/2020 14:21 (5), 03/29/2023 14:24 (4)
Complete: 🔍
Cache ID: 216::103

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

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