CVE-2009-4629

no score yetEPSS 0.9%

Mozilla Necko, as used in Thunderbird 3.0.1, SeaMonkey, and other applications, performs DNS prefetching even when the app type is APP_TYPE_MAIL or APP_TYPE_EDITOR, which makes it easier for remote attackers to determine the network location of the application's user by logging DNS requests, as demonstrated by DNS requests triggered by reading text/plain e-mail messages in Thunderbird.

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)
CWE: CWE-200
Published: 2010-01-29
Modified: 2026-06-16
Record from: the NVD, synced 2026-10-19

Affected

mozilla:seamonkey
mozilla:thunderbird

References

https://bugzilla.mozilla.org/show_bug.cgi?id=492196
https://secure.grepular.com/DNS_Prefetch_Exposure_on_Thunderbird_and_Webmail
https://bugzilla.mozilla.org/show_bug.cgi?id=492196
https://secure.grepular.com/DNS_Prefetch_Exposure_on_Thunderbird_and_Webmail

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