What is the severity of CVE-2021-29957?

CVE-2021-29957 has a moderate severity level due to the potential for user confusion regarding the protection of email message parts.

How do I fix CVE-2021-29957?

To fix CVE-2021-29957, update Mozilla Thunderbird to version 78.10.2 or later.

What versions of Thunderbird are affected by CVE-2021-29957?

CVE-2021-29957 affects all versions of Mozilla Thunderbird prior to 78.10.2.

What types of attacks does CVE-2021-29957 expose users to?

CVE-2021-29957 could expose users to the risk of unprotected message parts being misinterpreted as secure content.

Can CVE-2021-29957 affect other email clients?

CVE-2021-29957 specifically affects Mozilla Thunderbird and does not directly apply to other email clients.

Vulnerability/
CVE-2021-29957

medium

4.3

17/5/2021

24/6/2021

3/8/2024

CVE-2021-29957

First published: Mon May 17 2021(Updated: )

If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected.

Credit: security@mozilla.org

Affected Software	Affected Version	How to fix
Mozilla Thunderbird	<78.10.2	78.10.2
	<78.10.2	78.10.2
Mozilla Thunderbird	<78.10.2

Remedy

https://bugzilla.mozilla.org/show_bug.cgi?id=1673241

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

MFSA2021-22

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

What is the severity of CVE-2021-29957?
CVE-2021-29957 has a moderate severity level due to the potential for user confusion regarding the protection of email message parts.
How do I fix CVE-2021-29957?
To fix CVE-2021-29957, update Mozilla Thunderbird to version 78.10.2 or later.
What versions of Thunderbird are affected by CVE-2021-29957?
CVE-2021-29957 affects all versions of Mozilla Thunderbird prior to 78.10.2.
What types of attacks does CVE-2021-29957 expose users to?
CVE-2021-29957 could expose users to the risk of unprotected message parts being misinterpreted as secure content.
Can CVE-2021-29957 affect other email clients?
CVE-2021-29957 specifically affects Mozilla Thunderbird and does not directly apply to other email clients.

collector/nvd-index
collector/mozilla-advisory
vendor/mozilla
vendor/thunderbird
agent/type
agent/first-publish-date
agent/softwarecombine
source/Mozilla
agent/software-canonical-lookup
agent/remedy
agent/author
agent/severity
agent/references
agent/description
collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/event
agent/trending
agent/tags
agent/source
canonical/mozilla thunderbird

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Frequently Asked Questions

What is the severity of CVE-2021-29957?
CVE-2021-29957 has a moderate severity level due to the potential for user confusion regarding the protection of email message parts.
How do I fix CVE-2021-29957?
To fix CVE-2021-29957, update Mozilla Thunderbird to version 78.10.2 or later.
What versions of Thunderbird are affected by CVE-2021-29957?
CVE-2021-29957 affects all versions of Mozilla Thunderbird prior to 78.10.2.
What types of attacks does CVE-2021-29957 expose users to?
CVE-2021-29957 could expose users to the risk of unprotected message parts being misinterpreted as secure content.
Can CVE-2021-29957 affect other email clients?
CVE-2021-29957 specifically affects Mozilla Thunderbird and does not directly apply to other email clients.