Medium severity · published Aug 1, 2016
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…
6.5
CVSS
4.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.6% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
K5
Kerberos 5 · Mit
1.13; 1.13.1; 1.13.2; 1.13.3; 1.13.4; 1.13.5; +4 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-3120
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-3120
Issue Tracking
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458
lists.opensuse.org
http://lists.opensuse.org/opensuse-updates/2016-09/msg00035.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-2591.html
web.mit.edu
http://web.mit.edu/kerberos/krb5-1.13/
web.mit.edu
http://web.mit.edu/kerberos/krb5-1.14/
www.securityfocus.com
http://www.securityfocus.com/bid/92132
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