Xen up to 4.11.x on Intel x86 HLE Transaction input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Xen up to 4.11.x on Intel x86. This impacts an unknown function of the component HLE Transaction Handler. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2018-19967. 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 classified as problematic has been found in Xen up to 4.11.x on Intel x86 (Virtualization Software). This affects an unknown code of the component HLE Transaction Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

An issue was discovered in Xen through 4.11.x on Intel x86 platforms allowing guest OS users to cause a denial of service (host OS hang) because Xen does not work around Intel's mishandling of certain HLE transactions associated with the KACQUIRE instruction prefix.

The bug was discovered 11/06/2018. The weakness was shared 12/08/2018 by Security Team (Matt) (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2018-19967 since 12/07/2018. 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 vulnerability scanner Nessus provides a plugin with the ID 119288 (Xen Project HLE Transaction 'XACQUIRE' DoS (XSA-282)), 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 171796 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2019:13921-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119288) and SecurityFocus (BID 106182†). The entries VDB-107985, VDB-123007, VDB-127657 and VDB-127713 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 119288
Nessus Name: Xen Project HLE Transaction 'XACQUIRE' DoS (XSA-282)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/06/2018 🔍
11/06/2018 +0 days 🔍
11/29/2018 +23 days 🔍
12/07/2018 +8 days 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
12/08/2018 +1 days 🔍
12/08/2018 +0 days 🔍
04/19/2020 +498 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Security Team (Matt)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-19967 (🔍)
GCVE (CVE): GCVE-0-2018-19967
GCVE (VulDB): GCVE-100-127719
SecurityFocus: 106182 - Xen Multiple Privilege Escalation and Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/08/2018 13:41
Updated: 04/19/2020 09:23
Changes: 12/08/2018 13:41 (71), 04/19/2020 09:23 (8)
Complete: 🔍
Cache ID: 216::103

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

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