CVE-2016-3120
Summary
| CVE | CVE-2016-3120 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-08-01 02:59:12 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.0 6.5 MEDIUM from [email protected]
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-476 | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 4 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
SingleConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:S/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Mit | Kerberos 5 | 1.13 | All | All | All |
| Application | Mit | Kerberos 5 | 1.13.1 | All | All | All |
| Application | Mit | Kerberos 5 | 1.13.2 | All | All | All |
| Application | Mit | Kerberos 5 | 1.13.3 | All | All | All |
| Application | Mit | Kerberos 5 | 1.13.4 | All | All | All |
| Application | Mit | Kerberos 5 | 1.13.5 | All | All | All |
| Application | Mit | Kerberos 5 | 1.13.6 | All | All | All |
| Application | Mit | Kerberos 5 | 1.14 | All | All | All |
| Application | Mit | Kerberos 5 | 1.14.1 | All | All | All |
| Application | Mit | Kerberos 5 | 1.14.2 | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| MIT Kerberos KDC CVE-2016-3120 NULL Pointer Dereference Denial Of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Kerberos 5 Release 1.13.7 | af854a3a-2127-422b-91ae-364da2661108 | web.mit.edu | |
| Red Hat Customer Portal | af854a3a-2127-422b-91ae-364da2661108 | rhn.redhat.com | |
| openSUSE-SU-2016:2268-1: moderate: Security update for krb5 | af854a3a-2127-422b-91ae-364da2661108 | lists.opensuse.org | |
| RT/krbdev.mit.edu: Ticket #8458 Fix S4U2Self KDC crash when anon is restricted [CVE-2016-3120] | af854a3a-2127-422b-91ae-364da2661108 | krbdev.mit.edu | Issue Tracking |
| Fix S4U2Self KDC crash when anon is restricted · krb5/krb5@93b4a63 · GitHub | af854a3a-2127-422b-91ae-364da2661108 | github.com | |
| [SECURITY] Fedora 24 Update: krb5-1.14.1-8.fc24 - package-announce - Fedora Mailing-Lists | af854a3a-2127-422b-91ae-364da2661108 | lists.fedoraproject.org | |
| Kerberos 5 Release 1.14.4 | af854a3a-2127-422b-91ae-364da2661108 | web.mit.edu | |
| Kerberos KDC Null Pointer Dereference in validate_as_request() Lets Remote Authenticated Users Deny Service - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| [SECURITY] [DLA 1265-1] krb5 security update | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | |
| [SECURITY] Fedora 24 Update: krb5-1.14.1-8.fc24 - package-announce - Fedora Mailing-Lists | MITRE | lists.fedoraproject.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.