SB2020090930 - Privilege escalation in NFS client in Linux kernel

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Main Vulnerability Database SB2020090930

SB2020090930 - Privilege escalation in NFS client in Linux kernel

Published: September 9, 2020 Updated: March 12, 2021

Security Bulletin ID SB2020090930
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 security vulnerability.


1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2020-25212)

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

The vulnerability exists due to a TOCTOU mismatch in the NFS client code in the Linux kernel. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code on the system with elevated privileges.

Remediation

Install update from vendor's website.

References