SB2022010623 - IBM AIX update for OpenSSH
Published: January 6, 2022 Updated: January 10, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Improper Privilege Management (CVE-ID: CVE-2021-41617)
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper privilege management in sshd, when certain non-default configurations are used, because supplemental groups are not initialized as expected. Helper programs for AuthorizedKeysCommand and
AuthorizedPrincipalsCommand may run with privileges associated with
group memberships of the sshd process, if the configuration specifies
running the command as a different user. A local user can escalate privileges on the system.
2) Out-of-bounds read (CVE-ID: CVE-2021-3712)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when processing ASN.1 strings related to a confusion with NULL termination of strings in array. A remote attacker can pass specially crafted data to the application to trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.