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CVE-2003-0251

20
FAUCET Score

CVE-2003-0251 describes a denial-of-service vulnerability in ypserv NIS server versions prior to 2.7. An unauthenticated remote attacker can exploit this by sending a TCP client request and then failing to respond, causing the ypserv process to block. This vulnerability has a CVSS score of 5.0, indicating a low-severity issue with network access and partial availability impact. While there is no known exploit code in Metasploit or ExploitDB, and it is not on the KEV catalog, it has garnered significant community discussion with 10 mentions.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.7CPE matchmatch criteria
cpe:2.3:a:nis:ypserv_nis_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.69%
Probability of exploitation in next 30 days
EPSS Percentile
84.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0269 is in the 77th percentile among its peer group of 23,701 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux AS (Advanced Server) version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux ES version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 8.0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux Advanced Workstation 2.1
View patch

Vendor Advisories (1)

redhatCVE-2003-0251Moderate

security flaw

Aug 4, 2003

References

secunia.com / advisories/21112
securitytracker.com / id
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A667
sunsolve.sun.com / pub-cgi/retrieve.pl
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2003-173.html
PatchVendor Advisory
redhat.com / support/errata/RHSA-2003-201.html
securityfocus.com / archive/1/440454/100/0/threaded
securityfocus.com / bid/8031
turbolinux.com / security/TLSA-2003-43.txt
vupen.com / english/advisories/2006/2873