Input validation error in Kerberos 5 - CVE-2014-9421
Published: February 19, 2015 / Updated: May 27, 2022
Vulnerability identifier: #VU40888
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2014-9421
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows remote authenticated users to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via malformed XDR data, as demonstrated by data sent to kadmind.
Affected software
Kerberos 5
Amazon Linux AMI
SUSE Linux
Fedora
krb5
Amazon Linux AMI
SUSE Linux
Fedora
krb5
How to mitigate CVE-2014-9421
Install update from vendor's website.
krb5 - update to 1.12.2-14.fc21
External References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151103.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151437.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00016.html
- http://lists.opensuse.org/opensuse-updates/2015-02/msg00044.html
- http://rhn.redhat.com/errata/RHSA-2015-0439.html
- http://rhn.redhat.com/errata/RHSA-2015-0794.html
- http://web.mit.edu/kerberos/advisories/2015-001-patch-r113.txt
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2015-001.txt
- http://www.debian.org/security/2015/dsa-3153
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:069
- http://www.securityfocus.com/bid/72496
- http://www.ubuntu.com/usn/USN-2498-1
- https://github.com/krb5/krb5/commit/a197e92349a4aa2141b5dff12e9dd44c2a2166e3