Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | krb5 | 1.8.3+dfsg-6 | — |
| Debian 13 | krb5 | 1.8.3+dfsg-6 | — |
| Debian 12 | krb5 | 1.8.3+dfsg-6 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | krb5 +6 | 1.8.2-3.el6_0.6 | RHSA-2011:0356 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5 | 1.15-1.1 | openSUSE-SU-2024:10004-1 |
Advisories 2
- RHSA-2011:0356 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- openSUSE-SU-2024:10004-1 krb5-1.15-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- ADV-2011-0680 vdb-entry
- VU#943220 third-party-advisory
- ADV-2011-0673 vdb-entry
- 46881 vdb-entry
- FEDORA-2011-3462 vendor-advisory
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-003.txt
- kerberos-perpareerroras-code-execution(66101) vdb-entry
- SUSE-SR:2011:005 vendor-advisory
- ADV-2011-0722 vdb-entry
- ADV-2011-0763 vdb-entry
- USN-1088-1 vendor-advisory
- FEDORA-2011-3547 vendor-advisory
- FEDORA-2011-3464 vendor-advisory
- 43700 third-party-advisory
- MDVSA-2011:048 vendor-advisory
- RHSA-2011:0356 vendor-advisory
- ADV-2011-0672 vdb-entry
- 43783 third-party-advisory
- 43760 third-party-advisory
- 71183 vdb-entry
- 20110315 MITKRB5-SA-2011-003 [CVE-2011-0284] KDC double-free when PKINIT enabled mailing-list
- 1025216 vdb-entry
- 43881 third-party-advisory