{"id":"CVE-2009-4629","aliases":["EUVD-2009-4594","GHSA-vvr5-jq6q-h8jj"],"status":"published","title":"Mozilla Necko, as used in Thunderbird 3.0.1, SeaMonkey, and other applications, performs DNS...","description":"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.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00934,"percentile":0.60996,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2010-01-29T18:00:00Z","modified":"2026-06-16T23:14:03Z","products":[{"vendor":"mozilla","product":"seamonkey"},{"vendor":"mozilla","product":"thunderbird"}],"references":[{"url":"https://secure.grepular.com/DNS_Prefetch_Exposure_on_Thunderbird_and_Webmail","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=492196","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-4629"},{"url":"https://github.com/advisories/GHSA-vvr5-jq6q-h8jj"}],"sources":{"cve":[{"id":"CVE-2009-4629","description":"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.","status":"published","published":"2010-01-29T18:00:00Z","modified":"2024-09-17T02:58:07.207Z","updated_at":"2026-11-02T14:33:24.782697Z"}],"euvd":[{"id":"EUVD-2009-4594","description":"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.","status":"published","published":"2010-01-29T18:00:00Z","modified":"2024-09-17T02:58:07Z","updated_at":"2026-11-03T00:28:35.481673Z"}],"ghsa":[{"id":"GHSA-vvr5-jq6q-h8jj","title":"Mozilla Necko, as used in Thunderbird 3.0.1, SeaMonkey, and other applications, performs DNS...","description":"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.","status":"published","published":"2022-05-02T03:56:34Z","modified":"2023-01-31T05:08:17Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:49:22.342351Z"}],"nvd":[{"id":"CVE-2009-4629","description":"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.","status":"published","published":"2010-01-29T18:30:00.84Z","modified":"2026-06-16T23:14:03.297Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:01:38.33745Z"}]}}