Vulnerability CVE-2020-35111
Published: 2021-01-07

Description:
When an extension with the proxy permission registered to receive <all_urls>, the proxy.onRequest callback was not triggered for view-source URLs. While web content cannot navigate to such URLs, a user opening View Source could have inadvertently leaked their IP address. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

Type:

NVD-CWE-noinfo

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Mozilla -> Firefox 
Mozilla -> Firefox esr 
Mozilla -> Thunderbird 

 References:
https://bugzilla.mozilla.org/show_bug.cgi?id=1657916
https://www.mozilla.org/security/advisories/mfsa2020-54/
https://www.mozilla.org/security/advisories/mfsa2020-55/
https://www.mozilla.org/security/advisories/mfsa2020-56/
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