CVE-2009-0652: n/a vulnerability

CVE-2009-0652: The Internationalized Domain Names (IDN) blacklist in Mozilla Firefox 3.0.6 and other versions before 3.0.9...

The Internationalized Domain Names (IDN) blacklist in Mozilla Firefox 3.0.6 and other versions before 3.0.9; Thunderbird before 2.0.0.21; and SeaMonkey before 1.1.15 does not include box-drawing characters, which allows remote attackers to spoof URLs and conduct phishing attacks, as demonstrated by homoglyphs of the / (slash) and ? (question mark) characters in a subdomain of a .cn domain name, a different vulnerability than CVE-2005-0233. NOTE: some third parties claim that 3.0.6 is not affected, but much older versions perhaps are affected.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 04:40 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE is a phishing-enablement issue in older Mozilla products. Certain international domain characters could make a web address look like it contained normal URL separators, helping an attacker disguise a malicious domain as a trusted-looking URL. Exposure is mainly legacy desktop environments still running the affected Mozilla versions or old distribution packages. Modern supported browsers are unlikely to be exposed, but unmanaged kiosks, lab systems, embedded workstations, and archived virtual desktops should be checked. Treat this as a legacy hygiene and phishing-risk issue, not an emergency internet-facing server flaw. Escalate if affected clients remain in production or high-trust browsing environments. Mitigation focus: Upgrade Firefox, Thunderbird, and SeaMonkey beyond the fixed versions named by CVE.; Apply vendor distribution updates from Red Hat, Fedora, Debian, Ubuntu, Mandriva, or SUSE where applicable.; Prioritize retirement of unsupported 2009-era Mozilla packages..

Prepared: Jun 28, 2026, 11:23 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Feb 20, 2009, 19:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:11396CVE reference · vdb-entry, signature
FEDORA-2009-3875CVE reference · vendor-advisory, x_refsource_FEDORA
mozilla-firefox-homoglyph-spoofing(48974)CVE reference · vdb-entry, x_refsource_XF
https://www.blackhat.com/presentations/bh-dc-09/Marlinspike/BlackHat-DC-09-Marlinspike-Defeating-SSL.pdfCVE reference · x_refsource_MISC
USN-764-1CVE reference · vendor-advisory, x_refsource_UBUNTU

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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