CVE-2021-4126 — Mozilla Thunderbird vulnerability
8 documents6 sources
Severity
6.5MEDIUMNVD
OSV8.8
EPSS
0.3%
top 43.42%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedDec 22
Description
When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature. Starting with Thunderbird version 91.4.1, only the signature that belongs to the top level MIME part will be considered for the displayed status. T…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NExploitability: 2.8 | Impact: 3.6
Affected Packages6 packages
🔴Vulnerability Details
3GHSA▶
GHSA-v2cr-gvw4-g56p: When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mail↗2022-12-22
OSV▶
CVE-2021-4126: When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mail↗2022-12-22