THREATPORT/VULNERABILITY/CVE-2010-1321
MEDIUM SEVERITY

CVE-2010-1321

Kerberos 5 vulnerability

CVSS
6.8
EPSS
6.9%
EPSS pct
93th
Exploited
No known
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.
Affected vendor
Mit
Affected product
Kerberos 5
CVSS vector
AV:N/AC:L/Au:S/C:N/I:N/A:C
Weakness type (CWE)
  • CWE-476 — NULL Pointer Dereference
Published
2010-05-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring single-factor authentication. Successful exploitation leads to complete impact to availability.

Its EPSS score of 6.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2010-1321

  • Confirm whether Mit Kerberos 5 is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2010-1321.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2010-1321

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2010-1321 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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