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CVE-2003-0431

30
FAUCET Score

CVE-2003-0431 describes a critical vulnerability in Ethereal 0.9.12 and earlier, where the tvb_get_nstringz0 function fails to properly handle zero-length buffer sizes, leading to unknown but severe consequences. With a CVSS score of 10.0, this vulnerability is easily exploitable over the network with low attack complexity and no authentication, allowing for complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness despite a lack of media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.12CPE matchmatch criteria
cpe:2.3:a:ethereal_group:ethereal:*:*:*:*:*:*:*:*

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
2.26%
Probability of exploitation in next 30 days
EPSS Percentile
81.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0226 is in the 66th percentile among its peer group of 51,485 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (9)

debianpatch availablevia nvd_reference
View patch
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 Enterprise Linux WS version 2.1
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-2003-0431Low

security flaw

May 1, 2003

References

ftp.sco.com / pub/security/OpenLinux/CSSA-2003-030.0.txt
distro.conectiva.com.br / atualizacoes
secunia.com / advisories/9007
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A101
debian.org / security/2003/dsa-324
PatchVendor Advisory
ethereal.com / appnotes/enpa-sa-00010.html
PatchVendor AdvisoryURL Repurposed
redhat.com / support/errata/RHSA-2003-077.html