Command line arguments could have been injected during Firefox invocation as a shell handler for certain unsupported file types. This required Firefox to be configured as the default handler for a given file type and for a file downloaded to be opened in a third party application that insufficiently sanitized URL data. In that situation, clicking a link in the third party application could have been used to retrieve and execute files whose location was supplied through command line arguments. Note: This issue only affects Windows operating systems and when Firefox is configured as the default handler for non-default filetypes. Other operating systems are unaffected. This vulnerability affects Firefox < 73 and Firefox < ESR68.5.
The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.
| Link | Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2020-05/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-06/ | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1606596 | patch vendor advisory issue tracking |
| https://security.gentoo.org/glsa/202003-02 | third party advisory vendor advisory |