The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in the SPNEGO GSS-API functionality in MIT Kerberos 5 (aka krb5) 1.7 before 1.7.2 and 1.8 before 1.8.1 allows remote attackers to cause a denial of service (assertion failure and daemon crash) via an invalid packet that triggers incorrect preparation of an error token.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service
Official Statement from Red Hat (03/26/2010)
Not vulnerable. This flaw does not affect MIT krb5 as provided in Red Hat Enterprise Linux 3, 4, and 5.
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20100323 MITKRB5-SA-2010-002 denial of service in SPNEGO [CVE-2010-0628 VU#839413]
Vulnerable software and versions