NULL pointer dereference in Mit Kerberos 5
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.046 (91.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.046 · change: 0.000
Affected products
- Mit Kerberos 5 — versions 1.13, 1.13.1, 1.13.2
Weakness classification (CWE)
References
- github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7
- www.securityfocus.com/bid/92132 (vdb-entry)
- lists.debian.org/debian-lts-announce/2018/01/msg00040.html (mailing-list)
- lists.opensuse.org/opensuse-updates/2016-09/msg00035.html (vendor-advisory)
- krbdev.mit.edu/rt/Ticket/Display.html (Issue Tracking)
- www.securitytracker.com/id/1036442 (vdb-entry)
- web.mit.edu/kerberos/krb5-1.13/
- rhn.redhat.com/errata/RHSA-2016-2591.html (vendor-advisory)
- web.mit.edu/kerberos/krb5-1.14/
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2016-3120?
- CVE-2016-3120 is a medium-severity vulnerability in Mit Kerberos 5, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2016-08-01.
- How severe is CVE-2016-3120?
- Medium severity. CVSS v3 base score is 6.5 out of 10.