CVE-2000-0549

Published: Oct 13, 2000Updated: Apr 16, 2026 Sources: CVE List NVDNVD-CWE-Other

5.0MEDIUM

NVD MITRE

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAccess Vector

Network

AC:LAccess Complexity

Low

Au:NAuthentication

None

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:PAvailability

Partial

Open in CVSS calculator →

Weaknesses

NVD-CWE-Other

Affected Products

cygnus

commercialaka cygnus network security, kerbnet

cygnus network securityOn-prem

Security Products / vuln-mgmt-scanner

kerbnetOn-prem

Security Products / vuln-mgmt-scanner

mit

oss-project·USaka mit kerberos, mit krb5

kerberosOn-prem

Security Products / pki-crypto

kerberos 5On-prem

Operating Systems

and 1 more affected products View all →

Exploitability

Official Patch Available

References

http://archives.neohapsis.com/archives/bugtraq/2000-06/0064.html

archives.neohapsis.com

http://ciac.llnl.gov/ciac/bulletins/k-051.shtml

ciac.llnl.gov

http://web.mit.edu/kerberos/www/advisories/krb4kdc.txt

web.mit.edu

and 2 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2000-0549 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows