MEDIUM
CVE-2000-0547
CWE-120Published: June 9, 2000· Updated: Jun 16, 2026
5.0
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2000-0547 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:L/Au:N/C:N/I:N/A:P
Affected Vendors & Products
cygnus_network_security_project1 product(s)
cygnus network security
kerbnet_project1 product(s)
kerbnet
mit2 product(s)
kerberoskerberos 5
Source: NVD CPE · 7 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (10)
→
→
http://web.mit.edu/kerberos/www/advisories/krb4kdc.txtPatch · Vendor Advisory
→
http://www.cert.org/advisories/CA-2000-11.htmlThird Party Advisory · US Government Resource
→
http://www.securityfocus.com/bid/1338Third Party Advisory · VDB Entry
→
→
http://web.mit.edu/kerberos/www/advisories/krb4kdc.txtPatch · Vendor Advisory
→
http://www.cert.org/advisories/CA-2000-11.htmlThird Party Advisory · US Government Resource
→
http://www.securityfocus.com/bid/1338Third Party Advisory · VDB Entry
Quick Facts
CVE IDCVE-2000-0547
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-120
CISA KEVNo
Affected3 vendor(s)
PublishedJun 9, 2000
Related CVEs (CWE-120)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2000-0547 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.