NULL pointer dereference in Kerberos 5 - CVE-2014-4344
Published: June 3, 2022
Vulnerability identifier: #VU63966
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2014-4344
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: MIT
Affected software:
Kerberos 5
Kerberos 5
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5. A remote attacker can trigger denial of service conditions via an empty continuation token at a certain point during a SPNEGO negotiation.
How to mitigate CVE-2014-4344
Install update from vendor's website.
Sources
- http://advisories.mageia.org/MGASA-2014-0345.html
- http://aix.software.ibm.com/aix/efixes/security/nas_advisory1.asc
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=7970
- http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136360.html
- http://rhn.redhat.com/errata/RHSA-2015-0439.html
- http://secunia.com/advisories/59102
- http://secunia.com/advisories/60082
- http://secunia.com/advisories/60448
- http://secunia.com/advisories/61051
- http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15561.html
- http://www.debian.org/security/2014/dsa-3000
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:165
- http://www.osvdb.org/109389
- http://www.securityfocus.com/bid/69160
- http://www.securitytracker.com/id/1030706
- https://bugzilla.redhat.com/show_bug.cgi?id=1121877
- https://exchange.xforce.ibmcloud.com/vulnerabilities/95210
- https://github.com/krb5/krb5/commit/524688ce87a15fc75f87efc8c039ba4c7d5c197b
- https://github.com/krb5/krb5/commit/a7886f0ed1277c69142b14a2c6629175a6331edc