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.
Category
The product dereferences a pointer that it expects to be valid but is NULL.
6.8
CVSS
Severity: Medium
CVSS 2.0 •
AV:N/AC:L/Au:S/C:N/I:N/A:C
EPSS
Probability of exploitation activity in the next 30 days.
CVE-2010-1321 has been scored as a medium severity vulnerability.
How to fix CVE-2010-1321?
To fix CVE-2010-1321, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2010-1321 being actively exploited in the wild?
It is possible that CVE-2010-1321 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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