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CVE-2021-40824

MEDIUM

5.9

Description

A logic error in the room key sharing functionality of Element Android before 1.2.2 and matrix-android-sdk2 (aka Matrix SDK for Android) before 1.2.2 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 attacker to decrypt end-to-end encrypted messages sent by affected clients.

CVE Details

CVSS v3.1 Score5.9

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published9/13/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

matrix:elementmatrix:matrix-android-sdk2

Weaknesses (CWE)

CWE-290

References

https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.2.2(cve@mitre.org)

https://matrix.org/blog/2021/09/13/vulnerability-disclosure-key-sharing(cve@mitre.org)

https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.2.2(af854a3a-2127-422b-91ae-364da2661108)

https://matrix.org/blog/2021/09/13/vulnerability-disclosure-key-sharing(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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