SB2019012919 - Red Hat update for kernel-rt

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Main Vulnerability Database SB2019012919

SB2019012919 - Red Hat update for kernel-rt

Published: January 29, 2019

Security Bulletin ID SB2019012919
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) Privilege escalation (CVE-ID: CVE-2018-18559)

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:N/SI:N/SA:N/E:P/U:Clear


The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to improper handling of a certain multithreaded case involving packet_do_bind unregister and packet_notifier register actions after a race condition between fanout_add, from setsockopt, and a bind on an AF_PACKET socket. A local attacker can execute a program or file that submits malicious input, trigger a use-after-free condition and execute arbitrary code with kernel privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References