Cerca nel supporto

Attenzione alle mail truffa. Mozilla non chiederà mai di chiamare o mandare messaggi a un numero di telefono o di inviare dati personali. Segnalare qualsiasi attività sospetta utilizzando l'opzione “Segnala abuso”.

Ulteriori informazioni

Questa discussione è archiviata. Inserire una nuova richiesta se occorre aiuto.

"Content-Type" header code execution

more options

We are looking to find a fix for the code execution bug found in May of 2021:

Mozilla Firefox is vulnerable to code execution by a remote attacker who can convince a user to open a malicious file. By manipulating the "Content-Type" header of a file the attacker can cause Firefox to execute scripts concealed in files that appear to be of non-executable types.

We are looking to find a fix for the code execution bug found in May of 2021: Mozilla Firefox is vulnerable to code execution by a remote attacker who can convince a user to open a malicious file. By manipulating the "Content-Type" header of a file the attacker can cause Firefox to execute scripts concealed in files that appear to be of non-executable types.

Soluzione scelta

If you use my test document you will see that Firefox 96 still works the same way: when the server indicates this combination:

Content-Type: text/html Content-Disposition: attachment; filename=test.jpg

Firefox corrects the file name during the save process from test.jpg to test.jpg.html and you can open it as an HTML page rather than a corrupt JPEG image.

I don't know whether anyone has filed a bug. Normally security researchers would have done that before making a public disclosure but it is hard to search for security bugs.

If you want to file a new bug:

https://bugzilla.mozilla.org/

Leggere questa risposta nel contesto 👍 0

Tutte le risposte (5)

more options

Can you link to information about that vulnerability? To prevent a delay in your post appearing, add a space before the .com or .org in your link. (Otherwise, the reply is sent to the link spam moderation queue.)

more options
more options

I think this is what they're doing:

https://www.jeffersonscher.com/res/test_jpg.php

Adding screenshot of download dialog:

Modificato da jscher2000 - Support Volunteer il

more options

That was the site I saw about this issue but no official notice or fix which is what is needed.

more options

Soluzione scelta

If you use my test document you will see that Firefox 96 still works the same way: when the server indicates this combination:

Content-Type: text/html Content-Disposition: attachment; filename=test.jpg

Firefox corrects the file name during the save process from test.jpg to test.jpg.html and you can open it as an HTML page rather than a corrupt JPEG image.

I don't know whether anyone has filed a bug. Normally security researchers would have done that before making a public disclosure but it is hard to search for security bugs.

If you want to file a new bug:

https://bugzilla.mozilla.org/