Description
The Key Distribution Center (KDC) in Kerberos 5 (krb5) 1.2.7 and earlier allows remote, authenticated attackers to cause a denial of service (crash) on KDCs within the same realm using a certain protocol request that causes an out-of-bounds read of an array (aka "array overrun").
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 | 1.2.7-3 | — |
| Debian 13 | krb5 | 1.2.7-3 | — |
| Debian 12 | krb5 | 1.2.7-3 | — |
| Debian 3.0 | krb5 | 1.2.4-5woody4 | DSA-266 |
Advisories 1
- DSA-266 krb5 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- RHSA-2003:052 vendor-advisory
- 20030331 GLSA: krb5 & mit-krb5 (200303-28) mailing-list
- http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-005-buf.txt
- RHSA-2003:051 vendor-advisory
- 7184 vdb-entry
- DSA-266 vendor-advisory
- 54042 vendor-advisory