VULNERABILITY INTELLIGENCE
CVE-2009-4629
CVSS score5 MEDIUM
EPSS probability0.93%
CISA KEVNot currently listed
Published2010-01-29
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:N/A:N
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.
Weakness classification
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor