Description
Heap-based buffer overflow in the Key Distribution Center (KDC) in MIT Kerberos 5 (krb5) 1.4.1 and earlier allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a certain valid TCP or UDP request.
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 ↗Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | krb5 +4 | 1.3.4-17 | RHSA-2005:567 |
| RHEL 3 | krb5 +4 | 1.2.7-47 | RHSA-2005:562 |
Advisories 3
- RHSA-2005:567 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2005:562 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-757-1 krb5 - buffer overflow, double-free memory Debian Security (DSA / DLA) · Mar 9, 2026
References
- kerberos-kdc-krb5-udp-tcp-bo(21328) vdb-entry
- 20364 third-party-advisory
- RHSA-2005:567 vendor-advisory
- oval:org.mitre.oval:def:736 vdb-entry signature
- SUSE-SR:2005:017 vendor-advisory
- 14236 vdb-entry
- 20050712 MITKRB5-SA-2005-002: buffer overflow, heap corruption in KDC mailing-list
- 1014460 vdb-entry
- ADV-2006-2074 vdb-entry
- RHSA-2005:562 vendor-advisory
- 101809 vendor-advisory
- TLSA-2005-78 vendor-advisory
- IY85474 vendor-advisory
- oval:org.mitre.oval:def:9902 vdb-entry signature
- 16041 third-party-advisory
- USN-224-1 vendor-advisory
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2005-002-kdc.txt
- DSA-757 vendor-advisory
- APPLE-SA-2005-08-15 vendor-advisory
- 17135 third-party-advisory
- 17899 third-party-advisory
- ADV-2005-1066 vdb-entry
- APPLE-SA-2005-08-17 vendor-advisory
- VU#885830 third-party-advisory
- 2005-0036 vendor-advisory