CVE-2000-0549

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2000-06-09 · updated 2026-06-16

Description

Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remote attackers to cause a denial of service via a malformed request.

Affected products

Cygnus Network Security: 4.0
Cygnus Kerbnet: 5.0
MIT Kerberos: 4.0
MIT Kerberos 5: 1.0, 1.1, 1.1.1

References

http://archives.neohapsis.com/archives/bugtraq/2000-06/0064.html
http://ciac.llnl.gov/ciac/bulletins/k-051.shtml
http://web.mit.edu/kerberos/www/advisories/krb4kdc.txt
http://www.cert.org/advisories/CA-2000-11.html
http://www.redhat.com/support/errata/RHSA-2000-031.html
http://archives.neohapsis.com/archives/bugtraq/2000-06/0064.html
http://ciac.llnl.gov/ciac/bulletins/k-051.shtml
http://web.mit.edu/kerberos/www/advisories/krb4kdc.txt
http://www.cert.org/advisories/CA-2000-11.html
http://www.redhat.com/support/errata/RHSA-2000-031.html

Get alerted when CVE-2000-0549 or the next vulnerability affects your stack