Xen up to 4.10.x Grant-Table Transition access control

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Xen up to 4.10.x. This vulnerability affects unknown code of the component Grant-Table Transition. Performing a manipulation results in access control. This vulnerability is cataloged as CVE-2018-7541. The attack must be initiated from a local position. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Xen up to 4.10.x (Virtualization Software). It has been classified as problematic. This affects an unknown functionality of the component Grant-Table Transition. 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, integrity, and availability. The summary by CVE is:

An issue was discovered in Xen through 4.10.x allowing guest OS users to cause a denial of service (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1.

The bug was discovered 02/27/2018. The weakness was shared 02/27/2018 by Jan Beulich as XSA-255 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. This vulnerability is uniquely identified as CVE-2018-7541 since 02/27/2018. 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.

The vulnerability scanner Nessus provides a plugin with the ID 107098 (Xen gnttab_map_frame() Function Missing Mapping Check Upgrade Guest-to-host DoS (XSA-255)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 390158 (Oracle VM Server for x86 Security Update for xen (OVMSA-2018-0272)).

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 (107098) and SecurityFocus (BID 103177†). The entries VDB-113918, VDB-117441, VDB-117508 and VDB-117621 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: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 3.8
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
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: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 107098
Nessus Name: Xen gnttab_map_frame() Function Missing Mapping Check Upgrade Guest-to-host DoS (XSA-255)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 831688
OpenVAS Name: Debian Security Advisory DSA 4131-1 (xen - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

02/27/2018 🔍
02/27/2018 +0 days 🔍
02/27/2018 +0 days 🔍
02/27/2018 +0 days 🔍
02/27/2018 +0 days 🔍
02/27/2018 +0 days 🔍
02/28/2018 +1 days 🔍
03/02/2018 +2 days 🔍
02/16/2023 +1812 days 🔍

Sourcesinfo

Advisory: XSA-255
Researcher: Jan Beulich
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-7541 (🔍)
GCVE (CVE): GCVE-0-2018-7541
GCVE (VulDB): GCVE-100-113919

OVAL: 🔍

SecurityFocus: 103177 - Xen 'xen/common/grant_table.c' Denial of Service Vulnerability
SecurityTracker: 1040775

See also: 🔍

Entryinfo

Created: 02/28/2018 09:17
Updated: 02/16/2023 08:35
Changes: 02/28/2018 09:17 (77), 01/09/2020 11:00 (5), 02/16/2023 08:35 (4)
Complete: 🔍
Cache ID: 216:00F:103

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

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