SB2023062111 - Authentication bypass in FreeBSD pam_krb5
Published: June 21, 2023 Updated: August 2, 2023
Security Bulletin ID
SB2023062111
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Authentication (CVE-ID: CVE-2023-3326)
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in pam_krb5 module. A remote attacker with ability to control password and KDC responses can return a valid TGT ticket and bypass authentication process.
Successful exploitation of the vulnerability requires a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned.
Remediation
Install update from vendor's website.