CVE-2023-3326
Description
pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pam_krb5 has no way to validate the response from the KDC, and essentially trusts the tgt provided over the network as being valid. In a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned, an attacker that is able to control both the password and the KDC responses can return a valid tgt, allowing authentication to occur for any user on the system.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
20cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*+ 18 more
- cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*range: <12.4
- cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:b1-p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:b2-p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:p3:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:p4:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:p5:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:p6:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:p7:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.1:rc1-p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*
- (no CPE)range: 13.2-RELEASE
Patches
Vulnerability mechanics
References
3- security.freebsd.org/advisories/FreeBSD-SA-23:04.pam_krb5.ascnvdMitigationVendor Advisory
- security.netapp.com/advisory/ntap-20230714-0005/nvdThird Party Advisory
- security.freebsd.org/advisories/FreeBSD-SA-23:09.pam_krb5.ascnvd
News mentions
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