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Fencer Intel
high 7.6

CVE-2011-0284 json

Double free vulnerability in the prepare_error_as function in do_as_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5)…

published 2011-03-20 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0310

cvss
7.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.3%
EPSS 8.3% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Double free vulnerability in the prepare_error_as function in do_as_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 through 1.9, when the PKINIT feature is enabled, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via an e_data field containing typed data.

Patch / fix

  • krb5 Debian 14, Debian 13, Debian 12 1.8.3+dfsg-6

debian advisories DEBIAN-CVE-2011-0284

  • krb5 RHEL 6 1.8.2-3.el6_0.6
  • krb5-libs RHEL 6 1.8.2-3.el6_0.6
  • krb5-server RHEL 6 1.8.2-3.el6_0.6
  • krb5-server-ldap RHEL 6 1.8.2-3.el6_0.6
  • krb5-workstation RHEL 6 1.8.2-3.el6_0.6
  • krb5-pkinit-openssl RHEL 6 1.8.2-3.el6_0.6

red hat advisories RHSA-2011:0356

  • 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-2011-0284 updated cvss 5.0

(krb5kdc): Double-free flaw by handling error messages upon receiving certain AS_REQ's (MITKRB5-SA-2011-003)

  • Red Hat Enterprise Linux Desktop (v. 6) krb5 1.8.2-3.el6_0.6, krb5-libs 1.8.2-3.el6_0.6, krb5-workstation 1.8.2-3.el6_0.6, krb5-pkinit-openssl 1.8.2-3.el6_0.6 Red Hat Enterprise Linux Desktop Optional (v. 6) krb5 1.8.2-3.el6_0.6, krb5-server 1.8.2-3.el6_0.6, krb5-server-ldap 1.8.2-3.el6_0.6 Red Hat Enterprise Linux HPC Node (v. 6) krb5 1.8.2-3.el6_0.6, krb5-libs 1.8.2-3.el6_0.6 Red Hat Enterprise Linux HPC Node Optional (v. 6) krb5 1.8.2-3.el6_0.6, krb5-server 1.8.2-3.el6_0.6, krb5-server-ldap 1.8.2-3.el6_0.6, krb5-workstation 1.8.2-3.el6_0.6, krb5-pkinit-openssl 1.8.2-3.el6_0.6 Red Hat Enterprise Linux Server (v. 6) krb5 1.8.2-3.el6_0.6, krb5-libs 1.8.2-3.el6_0.6, krb5-server 1.8.2-3.el6_0.6, krb5-server-ldap 1.8.2-3.el6_0.6, krb5-workstation 1.8.2-3.el6_0.6, krb5-pkinit-openssl 1.8.2-3.el6_0.6 Red Hat Enterprise Linux Workstation (v. 6) krb5 1.8.2-3.el6_0.6, krb5-libs 1.8.2-3.el6_0.6, krb5-server 1.8.2-3.el6_0.6, krb5-server-ldap 1.8.2-3.el6_0.6, krb5-workstation 1.8.2-3.el6_0.6, krb5-pkinit-openssl 1.8.2-3.el6_0.6
    fixed: vendor fix RHSA-2011:0356
  • 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

8.27% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.6 AV:N/AC:H/Au:N/C:C/I:C/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.