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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
The kg_accept_krb5 function in krb5/accept_sec_context.c in the GSS-API library in MIT Kerberos 5 (aka krb5) through 1.7.1 and 1.8 before 1.8.2, as used in kadmind and other applications, does not properly check for invalid GSS-API tokens, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an AP-REQ message in which the authenticator's checksum field is missing.
Description Last Modified:
'CWE-476: NULL Pointer Dereference'
Access Vector (AV):
Access Complexity (AC):
Allows disruption of service
* kadmind and other GSS-API server applications in all known releases
of MIT krb5, up to and including krb5-1.8.1
* third-party GSS-API server applications that link link against the
GSS-API library in all known releases of MIT krb5, up to and
* Independent implementations of the krb5 GSS-API mechanism may be
vulnerable, as the underlying bug is based on plausible (but
invalid) assumptions about the Kerberos protocol.'
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http://www.securityfocus.com/archive/1/511331/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/516397/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/archive/1/516397/100/0/threaded [No Types Assigned]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11604 [No Types Assigned]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7198 [No Types Assigned]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7450 [No Types Assigned]
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:7450 [No Types Assigned]
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:7198 [No Types Assigned]
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:11604 [No Types Assigned]