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Use the correct sender key when checking shared secret #2730

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merged 2 commits into from Oct 4, 2022

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uhoreg
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@uhoreg uhoreg commented Oct 4, 2022

fixes element-hq/element-web#23374

Bug was introduced in the recent security release.

The incorrect code is checking the sender_key in the encrypted content, which is normally not set. It should have been checking the sender_key in the cleartext content, or event.getSenderKey().


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馃悰 Bug Fixes

@uhoreg uhoreg requested a review from a team as a code owner October 4, 2022 16:44
@uhoreg uhoreg added the T-Defect Bugs, crashes, hangs, vulnerabilities, or other reported problems label Oct 4, 2022
@turt2live
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does this need including in the RC that went out today?

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uhoreg commented Oct 4, 2022

does this need including in the RC that went out today?

If possible, this would probably be a good one to get in.

@turt2live turt2live added the backport staging Label to automatically backport PR to staging branch label Oct 4, 2022
@uhoreg uhoreg merged commit 890a840 into matrix-org:develop Oct 4, 2022
RiotRobot pushed a commit that referenced this pull request Oct 4, 2022
turt2live pushed a commit that referenced this pull request Oct 4, 2022
(cherry picked from commit 890a840)

Co-authored-by: Hubert Chathi <hubertc@matrix.org>
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Johennes commented Oct 5, 2022

Can / should this receive test coverage?

odelcroi added a commit to tchapgouv/tchap-web-v4 that referenced this pull request Oct 6, 2022
su-ex added a commit to SchildiChat/matrix-js-sdk that referenced this pull request Oct 29, 2022
* Changes the `uploadContent` API, kills off `request` and `browser-request` in favour of `fetch`, removed callback support on a lot of the methods, adds a lot of tests. ([\matrix-org#2719](matrix-org#2719)). Fixes matrix-org#2415 and matrix-org#801.
* Remove deprecated `m.room.aliases` references ([\matrix-org#2759](matrix-org#2759)). Fixes element-hq/element-web#12680.
* Remove node-specific crypto bits, use Node 16's WebCrypto ([\matrix-org#2762](matrix-org#2762)). Fixes matrix-org#2760.
* Export types for MatrixEvent and Room emitted events, and make event handler map types stricter ([\matrix-org#2750](matrix-org#2750)). Contributed by @stas-demydiuk.
* Use even more stable calls to `/room_keys` ([\matrix-org#2746](matrix-org#2746)).
* Upgrade to Olm 3.2.13 which has been repackaged to support Node 18 ([\matrix-org#2744](matrix-org#2744)).
* Fix `power_level_content_override` type ([\matrix-org#2741](matrix-org#2741)).
* Add custom notification handling for MSC3401 call events  ([\matrix-org#2720](matrix-org#2720)).
* Add support for unread thread notifications ([\matrix-org#2726](matrix-org#2726)).
* Load Thread List with server-side assistance (MSC3856) ([\matrix-org#2602](matrix-org#2602)).
* Use stable calls to `/room_keys` ([\matrix-org#2729](matrix-org#2729)). Fixes element-hq/element-web#22839.
* Fix POST data not being passed for registerWithIdentityServer ([\matrix-org#2769](matrix-org#2769)). Fixes matrix-org/element-web-rageshakes#16206.
* Fix IdentityPrefix.V2 containing spurious `/api` ([\matrix-org#2761](matrix-org#2761)). Fixes element-hq/element-web#23505.
* Always send back an httpStatus property if one is known ([\matrix-org#2753](matrix-org#2753)).
* Check for AbortError, not any generic connection error, to avoid tightlooping ([\matrix-org#2752](matrix-org#2752)).
* Correct the dir parameter of MSC3715 ([\matrix-org#2745](matrix-org#2745)). Contributed by @dhenneke.
* Fix sync init when thread unread notif is not supported ([\matrix-org#2739](matrix-org#2739)). Fixes element-hq/element-web#23435.
* Use the correct sender key when checking shared secret ([\matrix-org#2730](matrix-org#2730)). Fixes element-hq/element-web#23374.
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Unable to decrypt old message with cross device verification
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