SB2022021736 - SUSE update for xen 

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Main Vulnerability Database SB2022021736

SB2022021736 - SUSE update for xen

Published: February 17, 2022

Security Bulletin ID SB2022021736
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Incorrect authorization (CVE-ID: CVE-2022-23033)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to guest_physmap_remove_page() function does not remove p2m mappings. A local user issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, can cause information leaks, Denial of Service (DoS), or escalate privileges on the system.


2) Integer underflow (CVE-ID: CVE-2022-23034)

The vulnerability allows a local user can perform a denial of service attack.

The vulnerability exists due to integer underflow when unmapping a grant to address XSA-380. A local user can request two forms of mappings to perform a denial of service attack.


3) Incomplete cleanup (CVE-ID: CVE-2022-23035)

The vulnerability allows a local attacker to escalate privileges on the system.

The vulnerability exists due to insufficient cleanup of passed-through device IRQs. An attacker with physical access can cause a Denial of Service (DoS) and escalate privileges on the system.


Remediation

Install update from vendor's website.

References