CVE-2016-3120
6.5
MEDIUM
CVSS 3.1
EPSS 4.3%
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.
How to fix CVE-2016-3120
To remediate CVE-2016-3120, upgrade the affected package to a fixed version below.
- —upgrade to 1.13.6-r0 or later
- —upgrade to 1.14.3+dfsg-1 or later
Is CVE-2016-3120 being exploited?
Low — EPSS is 4.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.13.6-r0
- from 0, < 1.14.3+dfsg-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |