CVE-2021-4126
published 2022-12-22CVE-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 mailing list…
PriorityP428medium6.5CVSS 3.1
AVNACLPRNUIRSUCNIHAN
EPSS
0.43%
35.5th percentile
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.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | thunderbird | < thunderbird 1:91.4.1-1 (bookworm) | thunderbird 1:91.4.1-1 (bookworm) |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 91.4.1 | 91.4.1 |
| mozilla | thunderbird | >= 0 < 1:91.4.1-1~deb11u1 | 1:91.4.1-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:91.4.1-1 | 1:91.4.1-1 |
| mozilla | thunderbird | >= 0 < 1:91.4.1-1 | 1:91.4.1-1 |
| mozilla | thunderbird | >= 0 < 1:91.4.1-1 | 1:91.4.1-1 |
| mozilla | thunderbird | >= 0 < 1:91.5.0+build1-0ubuntu0.18.04.1 | 1:91.5.0+build1-0ubuntu0.18.04.1 |
| mozilla | thunderbird | >= 0 < 1:91.5.0+build1-0ubuntu0.20.04.1 | 1:91.5.0+build1-0ubuntu0.20.04.1 |
| mozilla | thunderbird | >= unspecified < 91.4.1 | 91.4.1 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian6.5MEDIUM
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GHSA
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
ghsa_unreviewed·2022-12-22
CVE-2021-4126 [MEDIUM] 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
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.
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
osv·2022-12-22·CVSS 6.5
CVE-2021-4126 [MEDIUM] 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
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.
OSV
thunderbird vulnerabilities
osv·2022-01-21·CVSS 8.8
CVE-2021-4129 [HIGH] thunderbird vulnerabilities
thunderbird vulnerabilities
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, trick a user into accepting unwanted
permissions, conduct header splitting attacks, conduct spoofing attacks,
bypass security restrictions, confuse the user, or execute arbitrary code.
(CVE-2021-4129, CVE-2021-4140, CVE-2021-29981, CVE-2021-29982,
CVE-2021-29987, CVE-2021-29991, CVE-2021-38495, CVE-2021-38496,
CVE-2021-38497, CVE-2021-38498, CVE-2021-38500, CVE-2021-38501,
CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507,
CVE-2021-38508, CVE-2021-38509, CVE-2021-43534, CVE-2021-43535,
CVE-2021-43536, CVE
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2022-01-21·CVSS 6.5
CVE-2021-4140 [MEDIUM] Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, conduct spoofing attacks, bypass security
restrictions, or execute arbitrary code. (CVE-2021-4129, CVE-2021-4140,
CVE-2021-43536, CVE-2021-43537, CVE-2021-43538, CVE-2021-43539,
CVE-2021-43541, CVE-2021-43542, CVE-2021-43543, CVE-2021-43545,
CVE-2021-43656, CVE-2022-22737, CVE-2022-22738, CVE-2022-22739,
CVE-2022-22740, CVE-2022-22741, CVE-2022-22742, CVE-2022-22743,
CVE-2022-22745, CVE-2022-22747, CVE-2022-22748, CVE-2022-22751)
It was discovered th
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2022-01-21·CVSS 8.8
CVE-2022-22742 [HIGH] Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, trick a user into accepting unwanted
permissions, conduct header splitting attacks, conduct spoofing attacks,
bypass security restrictions, confuse the user, or execute arbitrary code.
(CVE-2021-4129, CVE-2021-4140, CVE-2021-29981, CVE-2021-29982,
CVE-2021-29987, CVE-2021-29991, CVE-2021-38495, CVE-2021-38496,
CVE-2021-38497, CVE-2021-38498, CVE-2021-38500, CVE-2021-38501,
CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507,
CVE-2021-38508,
Debian
CVE-2021-4126: thunderbird - When receiving an OpenPGP/MIME signed email message that contains an additional ...
vendor_debian·2021·CVSS 6.5
CVE-2021-4126 [MEDIUM] CVE-2021-4126: thunderbird - When receiving an OpenPGP/MIME signed email message that contains an additional ...
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.
Scope: local
bookworm: resolved (fixed in 1:91.4.1-1)
bullseye: resolved (fixed in 1:91.4.1-1~deb11u1)
forky: resolved (fixed in 1:91.4.1-1)
sid: resolved (fixed in 1:91.4.1-1)
trixie: resolved (fixed in 1:91.4.1-1)
Mozilla
Mozilla Foundation Security Advisory 2021-55: CVE-2021-4126
vendor_mozilla·CVSS 6.5
CVE-2021-4126 [MEDIUM] Mozilla Foundation Security Advisory 2021-55: CVE-2021-4126
Mozilla Foundation Security Advisory 2021-55
CVE: CVE-2021-4126
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 91.4.1
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2022-12-22
Published