<p>Upgrade <code>Alpine:3.20</code> <code>xen</code> to version 4.13.0-r0 or higher.</p>

Incorrect Permission Assignment for Critical Resource Affecting xen package, versions <4.13.0-r0

Threat Intelligence

1.02% (85^th percentile)

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Snyk ID SNYK-ALPINE320-XEN-7012494
published 23 May 2024
disclosed 31 Oct 2019

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Introduced: 31 Oct 2019

CVE-2019-18422 Open this link in a new tab CWE-732 Open this link in a new tab

How to fix?

Upgrade Alpine:3.20 xen to version 4.13.0-r0 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 4.12.x allowing ARM guest OS users to cause a denial of service or gain privileges by leveraging the erroneous enabling of interrupts. Interrupts are unconditionally unmasked in exception handlers. When an exception occurs on an ARM system which is handled without changing processor level, some interrupts are unconditionally enabled during exception entry. So exceptions which occur when interrupts are masked will effectively unmask the interrupts. A malicious guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Network
Attack Complexity (AC)

Low
Privileges Required (PR)

Low
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

High
Integrity (I)

High
Availability (A)

High