CVE-2009-1834: n/a vulnerability

CVE-2009-1834: Visual truncation vulnerability in netwerk/dns/src/nsIDNService.cpp in Mozilla Firefox before 3.0.11 and Se...

Visual truncation vulnerability in netwerk/dns/src/nsIDNService.cpp in Mozilla Firefox before 3.0.11 and SeaMonkey before 1.1.17 allows remote attackers to spoof the location bar via an IDN with invalid Unicode characters that are displayed as whitespace, as demonstrated by the \u115A through \u115E characters.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 05:27 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old browser spoofing issue. A specially crafted internationalized domain name could make Firefox or SeaMonkey show misleading whitespace in the address bar, helping an attacker disguise the real site. The main business risk is phishing against users still running obsolete browsers or unpatched legacy Linux packages. Exposure is most likely in unsupported legacy desktops, embedded kiosks, lab systems, or old Linux distributions that still include Firefox before 3.0.11 or SeaMonkey before 1.1.17. Modern supported browsers are unlikely to be exposed based on the provided 2009 advisories. Prioritize remediation only where legacy browsers remain in use. For normal managed fleets on supported browsers, this should be a cleanup and assurance item rather than an emergency. Systems with public web browsing and obsolete Mozilla software deserve faster attention. Mitigation focus: Upgrade Firefox to 3.0.11 or later, preferably a currently supported release.; Upgrade SeaMonkey to 1.1.17 or later, preferably a currently supported release.; Apply relevant OS vendor browser packages from Red Hat, Fedora, Debian, or Slackware advisories..

Prepared: Jun 28, 2026, 10:45 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: Jun 12, 2009, 21:07 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

7Source 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:10436CVE reference · vdb-entry, signature
FEDORA-2009-6411CVE reference · vendor-advisory, x_refsource_FEDORA
FEDORA-2009-6366CVE reference · vendor-advisory, x_refsource_FEDORA
RHSA-2009:1095CVE reference · vendor-advisory, x_refsource_REDHAT
https://bugzilla.mozilla.org/show_bug.cgi?id=479413CVE reference · x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=503573CVE reference · x_refsource_CONFIRM

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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