Homepage
About Snyk

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

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.66% (80th percentile)
Expand this section
NVD
8.8 high
Expand this section
SUSE
8.8 high

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-ALPINE314-XEN-1308460
  • published 21 Jul 2020
  • disclosed 31 Oct 2019
Report a new vulnerability Found a mistake?

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:3.14 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:3.14 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