Read the docs
TI-2015-02376 Aliases CVE-2015-2694GHSA-6h2g-5cjr-jj97

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do…

Priority LOW 31CWE-264Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Security bypass
Confidentiality · integrity · availability
Partial · Partial · None
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-264.

Summary

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.

Why it matters now

EPSS 0.02832 86th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

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 · 6

CPEVersionsRoleVendor
cpe:2.3:a:mit:kerberos_5:1.12:*:*:*:*:*:*:*1.12Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.12.1:*:*:*:*:*:*:*1.12.1Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.12.2:*:*:*:*:*:*:*1.12.2Vulnerablemoos-ivp
cpe:2.3:a:mit:kerberos_5:1.12.3:*:*:*:*:*:*:*1.12.3Vulnerablemoos-ivp
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_5:1.12:*:*:*:*:*:*:* Versions 1.12 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.12.1:*:*:*:*:*:*:* Versions 1.12.1 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.12.2:*:*:*:*:*:*:* Versions 1.12.2 Vulnerable ·moos-ivp
  • cpe:2.3:a:mit:kerberos_5:1.12.3:*:*:*:*:*:*:* Versions 1.12.3 Vulnerable ·moos-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

Remediation

Red Hat 1 advisory

  • RHSA-2015:2154 Released 2015-11-19 · Red Hat rating Moderate
    krb5 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) krb5-1.13.2-10.el7, krb5-libs-1.13.2-10.el7, krb5-pkinit-1.13.2-10.el7 +1
    • Red Hat Enterprise Linux Client Optional (v. 7) krb5-devel-1.13.2-10.el7, krb5-server-1.13.2-10.el7, krb5-server-ldap-1.13.2-10.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) krb5-1.13.2-10.el7, krb5-libs-1.13.2-10.el7, krb5-pkinit-1.13.2-10.el7 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) krb5-devel-1.13.2-10.el7, krb5-server-1.13.2-10.el7, krb5-server-ldap-1.13.2-10.el7
    • Red Hat Enterprise Linux Server (v. 7) krb5-1.13.2-10.el7, krb5-devel-1.13.2-10.el7, krb5-devel-1.13.2-10.el7.ppc +6
    • Red Hat Enterprise Linux Workstation (v. 7) krb5-1.13.2-10.el7, krb5-devel-1.13.2-10.el7, krb5-libs-1.13.2-10.el7 +4

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2015:2154
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2015:2154
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2015:2154
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2015:2154
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2015:2154
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2015:2154
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-2694
  2. 2026-10-03 Alias added: GHSA-6h2g-5cjr-jj97

References

Advisory 3

Other 1

  • 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