Mozilla Foundation Security Advisory 2022-39
Security Vulnerabilities fixed in Thunderbird 91.13.1
- Announced
- September 19, 2022
- Impact
- high
- Products
- Thunderbird
- Fixed in
-
- Thunderbird 91.13.1
#CVE-2022-3033: Leaking of sensitive information when composing a response to an HTML email with a META refresh tag
- Reporter
- Sarah Jamie Lewis
- Impact
- high
Description
If a Thunderbird user replied to a crafted HTML email containing a meta tag, with the meta tag
having the http-equiv="refresh" attribute, and the content attribute specifying an URL, then
Thunderbird started a network request to that URL, regardless of the configuration to block
remote content. In combination with certain other HTML elements and attributes in the email,
it was possible to execute JavaScript code included in the message in the context of the
message compose document.
The JavaScript code was able to perform actions including, but probably not limited
to, read and modify the contents of the message compose document, including the quoted
original message, which could potentially contain the decrypted plaintext of encrypted data
in the crafted email.
The contents could then be transmitted to the network, either to the URL specified in the META refresh tag,
or to a different URL, as the JavaScript code could modify the URL specified in the document.
This bug doesn't affect users who have changed the default Message Body display setting to
'simple html' or 'plain text'.
References
#CVE-2022-3032: Remote content specified in an HTML document that was nested inside an iframe's srcdoc attribute was not blocked
- Reporter
- Sarah Jamie Lewis
- Impact
- moderate
Description
When receiving an HTML email that contained an iframe element, which used a srcdoc attribute to define the inner HTML document, remote objects specified in the nested document, for example images or videos, were not blocked. Rather, the network was accessed, the objects were loaded and displayed.
References
#CVE-2022-3034: An iframe element in an HTML email could trigger a network request
- Reporter
- Thunderbird Team
- Impact
- moderate
Description
When receiving an HTML email that specified to load an iframe element from a remote location, a request to the remote document was sent. However, Thunderbird didn't display the document.