Description
In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.
References (5)
Core 5
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/krb5/krb5/commit/ffb35baac6981f9e8914f8f3bffd37f284b85970
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HNWXM6OQU7G23MG7XWIOBRGP43ECLDT/
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:0666
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/100291
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBUTXMNZWMVJLQ4NDX5OQFPUVCJRLV3W/
Scores
CVSS v3
6.5
EPSS
0.0068
EPSS Percentile
71.7%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-617
Status
published
Products (46)
fedoraproject/fedora
25
fedoraproject/fedora
26
mit/kerberos
5-1.13.7
mit/kerberos_5
1.7
mit/kerberos_5
1.7.1
mit/kerberos_5
1.8
mit/kerberos_5
1.8.1
mit/kerberos_5
1.8.2
mit/kerberos_5
1.8.3
mit/kerberos_5
1.8.4
... and 36 more
Published
Aug 09, 2017
Tracked Since
Feb 18, 2026