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Fencer Intel
medium 5.8

CVE-2015-2694 json

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 be…

published 11y ago modified 4mo ago also EUVD-2015-2784

cvss
5.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

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.

Patch / fix

  • krb5 Debian 14, Debian 13, Debian 12 1.12.1+dfsg-20

debian advisories DEBIAN-CVE-2015-2694

  • krb5 Ubuntu 14.04 LTS 1.12+dfsg-2ubuntu5.2

ubuntu advisories UBUNTU-CVE-2015-2694

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • krb5 RHEL 7 1.13.2-10.el7
  • krb5-libs RHEL 7 1.13.2-10.el7
  • krb5-pkinit RHEL 7 1.13.2-10.el7
  • krb5-server RHEL 7 1.13.2-10.el7
  • krb5-server-ldap RHEL 7 1.13.2-10.el7
  • krb5-workstation RHEL 7 1.13.2-10.el7

red hat advisories RHSA-2015:2154

  • krb5 SLES for SAP 12, SLES 12, SLE Software Development Kit 12 1.12.1-16.1

suse advisories SUSE-SU-2015:1276-1

  • krb5 openSUSE Tumbleweed 1.15-1.1

opensuse advisories openSUSE-SU-2024:10004-1

Is CVE-2015-2694 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-2694 updated cvss 5.8

krb5: issues in OTP and PKINIT kdcpreauth modules leading to requires_preauth bypass

  • 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, krb5-workstation 1.13.2-10.el7 Red Hat Enterprise Linux Client Optional (v. 7) 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, krb5-workstation 1.13.2-10.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) 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-libs 1.13.2-10.el7, krb5-pkinit 1.13.2-10.el7, krb5-server 1.13.2-10.el7, krb5-server-ldap 1.13.2-10.el7, krb5-workstation 1.13.2-10.el7 Red Hat Enterprise Linux Workstation (v. 7) krb5 1.13.2-10.el7, krb5-libs 1.13.2-10.el7, krb5-pkinit 1.13.2-10.el7, krb5-server 1.13.2-10.el7, krb5-server-ldap 1.13.2-10.el7, krb5-workstation 1.13.2-10.el7
    fixed: vendor fix RHSA-2015:2154
  • Red Hat Enterprise Linux 5 krb5 Red Hat Enterprise Linux 6 krb5, libkadm5, krb5-libs, krb5-server, krb5-server-ldap, krb5-workstation, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.83% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.