SB2023062111 - Authentication bypass in FreeBSD pam_krb5

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Main Vulnerability Database SB2023062111

SB2023062111 - Authentication bypass in FreeBSD pam_krb5

Published: June 21, 2023 Updated: August 2, 2023

Security Bulletin ID SB2023062111
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Authentication (CVE-ID: CVE-2023-3326)

CWE-ID: CWE-287 - Improper Authentication

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


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.

References