CVE-2014-5355

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-02-20 · updated 2026-06-17

Description

MIT Kerberos 5 (aka krb5) through 1.13.1 incorrectly expects that a krb5_read_message data field is represented as a string ending with a '\0' character, which allows remote attackers to (1) cause a denial of service (NULL pointer dereference) via a zero-byte version string or (2) cause a denial of service (out-of-bounds read) by omitting the '\0' character, related to appl/user_user/server.c and lib/krb5/krb/recvauth.c.

Affected products

MIT Kerberos 5: 1.1, 1.2, 1.2.1, 1.2.2, 1.2.3, 1.2.4 (+54)

References

http://krbdev.mit.edu/rt/Ticket/Display.html?id=8050
http://lists.opensuse.org/opensuse-updates/2015-03/msg00061.html
http://rhn.redhat.com/errata/RHSA-2015-0794.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:069
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securityfocus.com/bid/74042
http://www.ubuntu.com/usn/USN-2810-1
https://github.com/krb5/krb5/commit/102bb6ebf20f9174130c85c3b052ae104e5073ec
https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8050
http://lists.opensuse.org/opensuse-updates/2015-03/msg00061.html

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