Unrated severityNVD Advisory· Published Dec 22, 2022· Updated Apr 16, 2025
CVE-2021-4126
CVE-2021-4126
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. This vulnerability affects Thunderbird < 91.4.1.
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Affected products
7< 91.4.1+ 1 more
- (no CPE)range: < 91.4.1
- (no CPE)range: unspecified
- osv-coords5 versionspkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.3pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/zabbix&distro=openSUSE%20Leap%2015.3pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP3pkg:rpm/suse/zabbix&distro=SUSE%20Package%20Hub%2015%20SP3
< 91.4.1-8.48.1+ 4 more
- (no CPE)range: < 91.4.1-8.48.1
- (no CPE)range: < 91.4.1-1.1
- (no CPE)range: < 4.0.38-bp153.2.3.1
- (no CPE)range: < 91.4.1-8.48.1
- (no CPE)range: < 4.0.38-bp153.2.3.1
Patches
Vulnerability mechanics
References
2News mentions
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