<p>Upgrade <code>Alpine:3.20</code> <code>xen</code> to version 4.13.0-r3 or higher.</p>

Improper Handling of Exceptional Conditions Affecting xen package, versions <4.13.0-r3

Threat Intelligence

0.08% (34^th percentile)

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Snyk ID SNYK-ALPINE320-XEN-7012534
published 23 May 2024
disclosed 14 Apr 2020

Report a new vulnerability Found a mistake?

Introduced: 14 Apr 2020

CVE-2020-11743 Open this link in a new tab CWE-755 Open this link in a new tab

How to fix?

Upgrade Alpine:3.20 xen to version 4.13.0-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine. See How to fix? for Alpine:3.20 relevant fixed versions and status.

An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Local
Attack Complexity (AC)

Low
Privileges Required (PR)

Low
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

None
Integrity (I)

None
Availability (A)

High