Description
The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.
References (5)
Core 5
Core References
Vendor Advisory x_refsource_confirm
https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/74824
Vendor Advisory x_refsource_confirm
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160
Vendor Advisory vendor-advisory
x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2810-1
Vendor Advisory x_refsource_confirm
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
Scores
EPSS
0.0089
EPSS Percentile
75.6%
Details
CWE
CWE-264
Status
published
Products (6)
mit/kerberos_5
1.12
mit/kerberos_5
1.12.1
mit/kerberos_5
1.12.2
mit/kerberos_5
1.12.3
mit/kerberos_5
1.13
mit/kerberos_5
1.13.1
Published
May 25, 2015
Tracked Since
Feb 18, 2026