What’s Vulnerable › Vulnerabilities

CVE-2000-0550

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2000-06-09 · updated 2026-06-16

Description

Kerberos 4 KDC program improperly frees memory twice (aka "double-free"), which allows remote attackers to cause a denial of service.

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://www.securityfocus.com/bid/1465
• 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://www.securityfocus.com/bid/1465

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