Rapid7 Vulnerability & Exploit Database

MFSA2022-43 Thunderbird: Security Vulnerabilities fixed in Thunderbird 102.3.1 (CVE-2022-39249)

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MFSA2022-43 Thunderbird: Security Vulnerabilities fixed in Thunderbird 102.3.1 (CVE-2022-39249)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/28/2022
Created
10/03/2022
Added
10/03/2022
Modified
10/03/2022

Description

Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others. This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end. Starting with version 19.7.0, the default policy for accepting key forwards has been made more strict in the matrix-js-sdk. matrix-js-sdk will now only accept forwarded keys in response to previously issued requests and only from own, verified devices. The SDK now sets a `trusted` flag on the decrypted message upon decryption, based on whether the key used to decrypt the message was received from a trusted source. Clients need to ensure that messages decrypted with a key with `trusted = false` are decorated appropriately, for example, by showing a warning for such messages. This attack requires coordination between a malicious homeserver and an attacker, and those who trust your homeservers do not need a workaround.

Solution(s)

  • mozilla-thunderbird-upgrade-102_3_1

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