Strix
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CVE-2016-3120

UnknownEPSS 4.62%

Last modified

CVE-2016-3120 is a vulnerability of currently unknown severity. The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.. EPSS estimates a 4.62% chance of exploitation in the next 30 days.

Description

The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.

Metrics

EPSS Probability
4.62%

90.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MitKerberos 51.13
MitKerberos 51.13.1
MitKerberos 51.13.2
MitKerberos 51.13.3
MitKerberos 51.13.4
MitKerberos 51.13.5
MitKerberos 51.13.6
MitKerberos 51.14
MitKerberos 51.14.1
MitKerberos 51.14.2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-3120?
The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.
How severe is CVE-2016-3120?
Severity scoring for CVE-2016-3120 is pending analysis. The EPSS model estimates a 4.62% probability of exploitation in the next 30 days.
How do I fix CVE-2016-3120?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-3120?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST