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Fencer Intel
critical 9.3

CVE-2012-1015 json

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5,…

published 2012-08-06 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-1053

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.8%
EPSS 4.8% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Patch / fix

  • krb5 Debian 14, Debian 13, Debian 12 1.10.1+dfsg-2

debian advisories DEBIAN-CVE-2012-1015

  • krb5 RHEL 6 1.9-33.el6_3.2
  • krb5-libs RHEL 6 1.9-33.el6_3.2
  • krb5-server RHEL 6 1.9-33.el6_3.2
  • krb5-server-ldap RHEL 6 1.9-33.el6_3.2
  • krb5-workstation RHEL 6 1.9-33.el6_3.2
  • krb5-pkinit-openssl RHEL 6 1.9-33.el6_3.2

red hat advisories RHSA-2012:1131

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-2012-1015 updated cvss 5.0

krb5: KDC daemon crash via free() of an uninitialized pointer

  • Red Hat Enterprise Linux Desktop (v. 6) krb5 1.9-33.el6_3.2, krb5-libs 1.9-33.el6_3.2, krb5-workstation 1.9-33.el6_3.2, krb5-pkinit-openssl 1.9-33.el6_3.2 Red Hat Enterprise Linux Desktop Optional (v. 6) krb5 1.9-33.el6_3.2, krb5-server 1.9-33.el6_3.2, krb5-server-ldap 1.9-33.el6_3.2 Red Hat Enterprise Linux HPC Node (v. 6) krb5 1.9-33.el6_3.2, krb5-libs 1.9-33.el6_3.2, krb5-workstation 1.9-33.el6_3.2, krb5-pkinit-openssl 1.9-33.el6_3.2 Red Hat Enterprise Linux HPC Node Optional (v. 6) krb5 1.9-33.el6_3.2, krb5-server 1.9-33.el6_3.2, krb5-server-ldap 1.9-33.el6_3.2 Red Hat Enterprise Linux Server (v. 6) krb5 1.9-33.el6_3.2, krb5-libs 1.9-33.el6_3.2, krb5-server 1.9-33.el6_3.2, krb5-server-ldap 1.9-33.el6_3.2, krb5-workstation 1.9-33.el6_3.2, krb5-pkinit-openssl 1.9-33.el6_3.2 Red Hat Enterprise Linux Workstation (v. 6) krb5 1.9-33.el6_3.2, krb5-libs 1.9-33.el6_3.2, krb5-server 1.9-33.el6_3.2, krb5-server-ldap 1.9-33.el6_3.2, krb5-workstation 1.9-33.el6_3.2, krb5-pkinit-openssl 1.9-33.el6_3.2
    fixed: vendor fix RHSA-2012:1131
  • Red Hat Enterprise Linux 5 krb5
    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

4.81% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation

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.