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FreeBSD: VID-93EB0E48-14BA-11EC-875E-901B0E9408DC (CVE-2021-40823): Matrix clients -- several vulnerabilities

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FreeBSD: VID-93EB0E48-14BA-11EC-875E-901B0E9408DC (CVE-2021-40823): Matrix clients -- several vulnerabilities

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
08/23/2021
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

Description

A logic error in the room key sharing functionality of matrix-js-sdk (aka Matrix Javascript SDK) before 12.4.1 allows a malicious Matrix homeserver present in an encrypted room to steal room encryption keys (via crafted Matrix protocol messages) that were originally sent by affected Matrix clients participating in that room. This allows the homeserver to decrypt end-to-end encrypted messages sent by affected clients.

Solution(s)

  • freebsd-upgrade-package-cinny
  • freebsd-upgrade-package-element-web
  • freebsd-upgrade-package-nheko

References

  • CVE-2021-40823

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