Related Vulnerabilities: CVE-2017-7814  

A security issue has been found in Thunderbird < 52.4. File downloads encoded with blob: and data: URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious.

Severity Medium

Remote Yes

Type Access restriction bypass

Description

A security issue has been found in Thunderbird < 52.4. File downloads encoded with blob: and data: URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious.

AVG-441 thunderbird 52.3.0-2 52.4.0-1 Critical Fixed

12 Oct 2017 ASA-201710-19 AVG-441 thunderbird Critical multiple issues

https://www.mozilla.org/en-US/security/advisories/mfsa2017-23/#CVE-2017-7814
https://bugzilla.mozilla.org/show_bug.cgi?id=1376036