SB2020040416 - Race condition in xen (Alpine package)

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Main Vulnerability Database SB2020040416

SB2020040416 - Race condition in xen (Alpine package)

Published: April 4, 2020

Security Bulletin ID SB2020040416
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2019-17346)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear


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

The vulnerability exists due to a race condition when processing TLB flushing on PCID-enabled guest system. A local user of guest operating system can crash a hosts system or execute arbitrary code on other guests.

Only x86 systems with at least one PCID-enabled PV guest are vulnerable.


Remediation

Install update from vendor's website.

References