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CVE-2000-0391

26
FAUCET Score

CVE-2000-0391 describes a critical buffer overflow vulnerability in the krshd daemon within Kerberos 5, affecting products from Cygnus, MIT, and Red Hat. This flaw allows unauthenticated remote attackers to achieve root privileges due to its network-based attack vector and low complexity, leading to complete compromise of confidentiality, integrity, and availability. While rated with a CVSS score of 10.0 and a high FAUCET Risk Score, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:cygnus:cygnus_network_security:4.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:a:cygnus:kerbnet:5.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mit:kerberos:4.0:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.0:*:*:*:*:*:*:*
1.1.1CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.06%
Probability of exploitation in next 30 days
EPSS Percentile
89.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0406 is in the 82nd percentile among its peer group of 51,466 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2000-0391

security flaw

May 16, 2000

References

archives.neohapsis.com / archives/bugtraq/2000-05/0184.html
archives.neohapsis.com / archives/freebsd/2000-05/0295.html
cert.org / advisories/CA-2000-06.html
Third Party AdvisoryUS Government Resource
osvdb.org / 4876
redhat.com / support/errata/RHSA-2000-025.html
securityfocus.com / bid/1220