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Vulnerability details: VCID-rdx9-trru-aaam
Vulnerability ID VCID-rdx9-trru-aaam
Aliases CVE-2016-3120
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-3120.html
rhas Low https://access.redhat.com/errata/RHSA-2016:2591
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-3120.json
epss 0.01154 https://api.first.org/data/v1/epss?cve=CVE-2016-3120
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epss 0.04888 https://api.first.org/data/v1/epss?cve=CVE-2016-3120
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rhbs low https://bugzilla.redhat.com/show_bug.cgi?id=1361050
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3120
cvssv2 2.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2016-3120
cvssv3 6.5 https://nvd.nist.gov/vuln/detail/CVE-2016-3120
Reference id Reference type URL
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458
http://lists.opensuse.org/opensuse-updates/2016-09/msg00035.html
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-3120.html
http://rhn.redhat.com/errata/RHSA-2016-2591.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-3120.json
https://api.first.org/data/v1/epss?cve=CVE-2016-3120
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3120
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7
https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/
http://web.mit.edu/kerberos/krb5-1.13/
http://web.mit.edu/kerberos/krb5-1.14/
http://www.securityfocus.com/bid/92132
http://www.securitytracker.com/id/1036442
1361050 https://bugzilla.redhat.com/show_bug.cgi?id=1361050
832572 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=832572
cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13.4:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.13.4:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.14.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:1.14.2:*:*:*:*:*:*:*
CVE-2016-3120 https://nvd.nist.gov/vuln/detail/CVE-2016-3120
RHSA-2016:2591 https://access.redhat.com/errata/RHSA-2016:2591
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-3120.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:H/Au:S/C:N/I:N/A:P Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2016-3120
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2016-3120
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.76599
EPSS Score 0.01154
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.