Home/CVE/Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remot
CVE

CVE-2000-0549

Kerberos 4 KDC program does not properly check for null termination of AUTH_MSG_KDC_REQUEST requests, which allows remot

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.

MEDIUM · CVSS 5 EPSS 0.01332
Schedule remediation
  • Public exploit or PoC is available
Sigma rules8 YARA rules0
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Affected Products & Versions

4
cygnus network securityall versions
cygnus kerbnetall versions
mit kerberosall versions
mit kerberos 5all versions
⚠

Public Exploits & PoCs

1
pocarchives.neohapsis.com · 0064.htmlarchives.neohapsis.com
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious DNS Query Indicating Kerberos Coercion via DNS Object SPN Spoofing - Network
producthighSuspicious Kerberos Ticket Request via PowerShell Script - ScriptBlock
producthighSuspicious DNS Query Indicating Kerberos Coercion via DNS Object SPN Spoofing
producthighAttempts of Kerberos Coercion Via DNS SPN Spoofing
producthighSuspicious Kerberos Ticket Request via CLI
producthighPotential Kerberos Coercion by Spoofing SPNs via DNS Manipulation
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Scoring & Timeline

5
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Published to NVD09 Jun 2000 · 04:00 AM
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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.htmlPatchThird Party AdvisoryUS Government Resource
http://www.redhat.com/support/errata/RHSA-2000-031.html
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