Multiple serious vulnerabilities have been found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to obtain sensitive information, cause denial of service, bypass security restrictions and spoof user interface.

Below is a complete list of vulnerabilities:

1. Multiple memory corruption vulnerabilities in Skia can be exploited remotely to cause denial of service;
2. An information disclosure vulnerability in S/MIME can be exploited locally via chosen-ciphertext attack to obtain sensitive information;
3. Multiple use-after-free vulnerabilities can be exploited remotely to cause denial of service;
4. An integer overflow and out-of-bounds write vulnerabilities in Skia can be exploited remotely to cause denial of service;
5. An unspecified vulnerability can be exploited remotely via specially crafted message headers to obtain sensitive information;
6. An unspecified vulnerability can be exploited remotely via src attribute of remote images or links to obtain sensitive information;
7. An unspecified vulnerability can be exploited remotely via attachment filename to spoof user interface;
8. An unspecified vulnerability can be exploited remotely via specially crafted website to bypass security restrictions;
9. A buffer overflow vulnerability can be exploited remotely to cause denial of service.

Mozilla Thunderbird earlier than 52.8

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Mozilla Foundation Security Advisory 2018-13