SB2021031022 - Ubuntu update for openssh

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Main Vulnerability Database SB2021031022

SB2021031022 - Ubuntu update for openssh

Published: March 10, 2021

Security Bulletin ID SB2021031022
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Double Free (CVE-ID: CVE-2021-28041)

CWE-ID: CWE-415 - Double Free

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


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in ssh-agent. A remote attacker can trick the victim to connect to a server, where the attacker has root privileges, pass specially crafted data to the ssh client, trigger a double free error and execute arbitrary code on the target system.

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


Remediation

Install update from vendor's website.

References