Input validation error in Kerberos 5 - CVE-2014-5355
Published: February 20, 2015 / Updated: May 27, 2022
Vulnerability identifier: #VU40884
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2014-5355
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows remote attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can (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 '' character, related to appl/user_user/server.c and lib/krb5/krb/recvauth.c.
Affected software
Kerberos 5
Amazon Linux AMI
Fedora
krb5
Amazon Linux AMI
Fedora
krb5
How to mitigate CVE-2014-5355
Install update from vendor's website.
krb5 - update to 1.13.1-2.fc22
External 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