Home/CVE/Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the localrealm variab
CVE

CVE-2000-0547

Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the localrealm variab

Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the localrealm variable in the process_v4 function.

MEDIUM · CVSS 5 EPSS 0.02576
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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Affected Products & Versions

6
cygnus network security project cygnus network securityall versions
kerbnet project kerbnetall versions
mit kerberos< 4.0
mit kerberosall versions
mit kerberos 5>= 1.0 and <= 1.0.7
mit kerberos 5all versions
◈

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

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://archives.neohapsis.com/archives/bugtraq/2000-06/0064.htmlBroken Link
http://ciac.llnl.gov/ciac/bulletins/k-051.shtmlBroken Link
http://web.mit.edu/kerberos/www/advisories/krb4kdc.txtPatchVendor Advisory
http://www.cert.org/advisories/CA-2000-11.htmlThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/1338Third Party AdvisoryVDB Entry
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