Xen up to 4.10.x Debug Exception Trigger access control

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 was found in Xen 4.6.x/4.7.x/4.8.x/4.9.x/4.10.x. Affected by this vulnerability is an unknown functionality of the component Debug Exception Trigger. The manipulation results in access control. This vulnerability is known as CVE-2018-12893. It is possible to launch the attack remotely. No exploit is available. Applying a patch is advised to resolve 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). It has been classified as critical. Affected is an unknown function of the component Debug Exception Trigger. 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 bug was discovered 06/27/2018. The weakness was published 06/27/2018 by Andrew Cooper with Citrix as XSA-265 as confirmed security advisory (Website). The advisory is shared for download at xenbits.xen.org. This vulnerability is traded as CVE-2018-12893 since 06/26/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

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 104572†) and SecurityTracker (ID 1041202†). Similar entries are available at VDB-119508, VDB-120119 and VDB-120147. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: Access control
CWE: CWE-264
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-265
Researcher: Andrew Cooper
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-12893 (🔍)
GCVE (CVE): GCVE-0-2018-12893
GCVE (VulDB): GCVE-100-120120

OVAL: 🔍

SecurityFocus: 104572 - Xen CVE-2018-12893 Local Denial of Service Vulnerability
SecurityTracker: 1041202

See also: 🔍

Entryinfo

Created: 07/01/2018 10:59
Updated: 03/29/2023 14:26
Changes: 07/01/2018 10:59 (80), 02/23/2020 14:32 (6), 03/29/2023 14:26 (4)
Complete: 🔍
Cache ID: 216::103

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