How severe is CVE-2012-1016?

CVE-2012-1016 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2012-1016 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1016?

CVE-2012-1016 affects Mit Kerberos 5. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-1016?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-1016 published?

CVE-2012-1016 was published on 2013-03-05 and last updated on 2026-06-16.

CVE-2012-1016

CVE-2012-1016 is a medium-severity vulnerability in Mit Kerberos 5 with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Mit Kerberos 5
Published: 2013-03-05
Last modified: 2026-06-16

Description

The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts to find an agility KDF identifier in inappropriate circumstances, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted Draft 9 request.

Frequently asked questions

What is CVE-2012-1016?: The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts to find an agility KDF identifier in inappropriate circumstances, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted Draft 9 request.
How severe is CVE-2012-1016?: CVE-2012-1016 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2012-1016 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-1016?: CVE-2012-1016 affects Mit Kerberos 5. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-1016?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-1016 published?: CVE-2012-1016 was published on 2013-03-05 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*

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