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Bug 882079 (CVE-2022-4055) - x11-misc/xdg-utils: xdg-email mailto thunderbird mishandling
Summary: x11-misc/xdg-utils: xdg-email mailto thunderbird mishandling
Alias: CVE-2022-4055
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B4 [upstream]
Depends on:
Reported: 2022-11-20 03:12 UTC by John Helmert III
Modified: 2022-11-20 03:16 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-11-20 03:12:57 UTC

When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.

Note that "This is different from Issue 177 where the handling of
attachments is intended. Here it is not." where issue 177 is our bug 756838.