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Fencer Intel
medium 6.8

CVE-2011-1530 json

The process_tgs_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.2 allows rem…

published 2011-12-08 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1531

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

The process_tgs_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.2 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS request that triggers an error other than the KRB5_KDB_NOENTRY error.

Patch / fix

  • krb5 Debian 14, Debian 13, Debian 12 1.10+dfsg~alpha1-7

debian advisories DEBIAN-CVE-2011-1530

  • krb5 RHEL 6 1.9-22.el6_2.1
  • krb5-libs RHEL 6 1.9-22.el6_2.1
  • krb5-server RHEL 6 1.9-22.el6_2.1
  • krb5-server-ldap RHEL 6 1.9-22.el6_2.1
  • krb5-workstation RHEL 6 1.9-22.el6_2.1
  • krb5-pkinit-openssl RHEL 6 1.9-22.el6_2.1

red hat advisories RHSA-2011:1790

  • krb5 openSUSE Tumbleweed 1.15-1.1

opensuse advisories openSUSE-SU-2024:10004-1

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-2011-1530 updated cvss 4.0

(krb5kdc): NULL pointer dereference in the TGS handling (MITKRB5-SA-2011-007)

  • Red Hat Enterprise Linux Desktop (v. 6) krb5 1.9-22.el6_2.1, krb5-libs 1.9-22.el6_2.1, krb5-workstation 1.9-22.el6_2.1, krb5-pkinit-openssl 1.9-22.el6_2.1 Red Hat Enterprise Linux Desktop Optional (v. 6) krb5 1.9-22.el6_2.1, krb5-server 1.9-22.el6_2.1, krb5-server-ldap 1.9-22.el6_2.1 Red Hat Enterprise Linux HPC Node (v. 6) krb5 1.9-22.el6_2.1, krb5-libs 1.9-22.el6_2.1, krb5-workstation 1.9-22.el6_2.1, krb5-pkinit-openssl 1.9-22.el6_2.1 Red Hat Enterprise Linux HPC Node Optional (v. 6) krb5 1.9-22.el6_2.1, krb5-server 1.9-22.el6_2.1, krb5-server-ldap 1.9-22.el6_2.1 Red Hat Enterprise Linux Server (v. 6) krb5 1.9-22.el6_2.1, krb5-libs 1.9-22.el6_2.1, krb5-server 1.9-22.el6_2.1, krb5-server-ldap 1.9-22.el6_2.1, krb5-workstation 1.9-22.el6_2.1, krb5-pkinit-openssl 1.9-22.el6_2.1 Red Hat Enterprise Linux Workstation (v. 6) krb5 1.9-22.el6_2.1, krb5-libs 1.9-22.el6_2.1, krb5-server 1.9-22.el6_2.1, krb5-server-ldap 1.9-22.el6_2.1, krb5-workstation 1.9-22.el6_2.1, krb5-pkinit-openssl 1.9-22.el6_2.1
    fixed: vendor fix RHSA-2011:1790
  • Red Hat Enterprise Linux 4 krb5 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

2.38% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:L/Au:S/C:N/I:N/A:C

Classification

Weakness
  • CWE-399 Resource Management Errors

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.