SB2020120931 - Privilege escalation in tty subsystem in Linux kernel

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Main Vulnerability Database SB2020120931

SB2020120931 - Privilege escalation in tty subsystem in Linux kernel

Published: December 9, 2020 Updated: August 9, 2024

Security Bulletin ID SB2020120931
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) Improper locking (CVE-ID: CVE-2020-29661)

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

The vulnerability exists due to locking error in the tty subsystem of the Linux kernel in drivers/tty/tty_jobctrl.c. An local user can exploit this vulnerability to trigger a use-after-free error against TIOCSPGRP and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References