Skip to content
Fencer Vulns
high 7.5

CVE-2005-0233 in the critical feed json

The International Domain Name (IDN) support in Firefox 1.0, Camino .8.5, and Mozilla before 1.7.6 allows remote attackers to spoof domain n…

published 2005-02-07 21 y ago modified 2026-06-16 4 mo ago also EUVD-2005-0234

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
20.4%
EPSS 20.4% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

The International Domain Name (IDN) support in Firefox 1.0, Camino .8.5, and Mozilla before 1.7.6 allows remote attackers to spoof domain names using punycode encoded domain names that are decoded in URLs and SSL certificates in a way that uses homograph characters from other character sets, which facilitates phishing attacks.

Patch / fix

  • mozilla mozilla 1.7.6
  • firefox RHEL 4 1.0.1-1.4.3

red hat advisories RHSA-2005:176

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2005-0233 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 firefox 1.0.1-1.4.3 Red Hat Enterprise Linux Desktop version 4 firefox 1.0.1-1.4.3 Red Hat Enterprise Linux ES version 4 firefox 1.0.1-1.4.3 Red Hat Enterprise Linux WS version 4 firefox 1.0.1-1.4.3
    fixed: vendor fix RHSA-2005:176

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

20.40% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • novell.com http://www.novell.com/linux/security/advisories/2005_16_mozilla_firefox.html referenced PoC, tagged "exploit" by a source, unverified
  • gentoo.org http://www.gentoo.org/security/en/glsa/glsa-200503-30.xml referenced PoC, tagged "exploit" by a source, unverified
  • gentoo.org http://www.gentoo.org/security/en/glsa/glsa-200503-10.xml referenced PoC, tagged "exploit" by a source, unverified
  • mozilla.org http://www.mozilla.org/security/announce/mfsa2005-29.html referenced PoC, tagged "exploit" by a source, unverified
  • shmoo.com http://www.shmoo.com/idn/homograph.txt referenced PoC, tagged "exploit" by a source, unverified
  • lists.grok.org.uk http://lists.grok.org.uk/pipermail/full-disclosure/2005-February/031459.html referenced PoC, tagged "exploit" by a source, unverified
  • shmoo.com http://www.shmoo.com/idn referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.