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TI-2016-02617 Aliases CVE-2016-3120GHSA-8q8p-vxj6-fg2g

The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in…

Priority LOW 36CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 6 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

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.

Why it matters now

EPSS 0.0462 91st percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 6 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*1.13Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*1.13.1Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:*1.13.2Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:*1.13.3Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.13.4:*:*:*:*:*:*:*1.13.4Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:*1.13.5Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:*1.13.6Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:*1.14Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:*1.14.1Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.14.2:*:*:*:*:*:*:*1.14.2Vulnerablemoos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:* Versions 1.13 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:* Versions 1.13.1 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:* Versions 1.13.2 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:* Versions 1.13.3 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.13.4:*:*:*:*:*:*:* Versions 1.13.4 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:* Versions 1.13.5 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:* Versions 1.13.6 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:* Versions 1.14 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:* Versions 1.14.1 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.14.2:*:*:*:*:*:*:* Versions 1.14.2 Vulnerable ·moos-ivp

Remediation

Red Hat 1 advisory

  • RHSA-2016:2591 Released 2016-11-03 · Red Hat rating Low
    krb5 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) krb5-1.14.1-26.el7, krb5-libs-1.14.1-26.el7, krb5-pkinit-1.14.1-26.el7 +2
    • Red Hat Enterprise Linux Client Optional (v. 7) krb5-devel-1.14.1-26.el7, krb5-server-1.14.1-26.el7, krb5-server-ldap-1.14.1-26.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) krb5-1.14.1-26.el7, krb5-libs-1.14.1-26.el7, krb5-pkinit-1.14.1-26.el7 +2
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) krb5-devel-1.14.1-26.el7, krb5-server-1.14.1-26.el7, krb5-server-ldap-1.14.1-26.el7
    • Red Hat Enterprise Linux Server (v. 7) krb5-1.14.1-26.el7, krb5-devel-1.14.1-26.el7, krb5-devel-1.14.1-26.el7.ppc +8
    • Red Hat Enterprise Linux Workstation (v. 7) krb5-1.14.1-26.el7, krb5-devel-1.14.1-26.el7, krb5-libs-1.14.1-26.el7 +5

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:2591
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:2591
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:2591
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:2591
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:2591
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:2591
Not affected: 5 products
  • Red Hat Enterprise Linux 5
  • Red Hat JBoss Enterprise Application Platform 6
  • Red Hat JBoss Enterprise Application Platform 7
  • Red Hat JBoss Enterprise Web Server 2
  • Red Hat JBoss Enterprise Web Server 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-3120
  2. 2026-10-03 Alias added: GHSA-8q8p-vxj6-fg2g

References

Advisory 3

Other 5

  • TI-2024-17421 Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/lib/gssapi/krb5/k5sealv3.c. CVSS 3.1HIGH 7.5
  • TI-2001-00539 Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows… CVSS 2.0HIGH 10.0
  • TI-2026-29130 NULL pointer dereference in moos-ivp Kerberos 5 CVSS 3.1HIGH 7.5
  • TI-2007-00929 The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass… CVSS 2.0HIGH 10.0
  • TI-2011-00268 The process_chpw_request function in schpw.c in the password-changing functionality in… CVSS 2.0HIGH 10.0
  • TI-2001-00245 Buffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary… CVSS 2.0HIGH 10.0
See all 138 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences