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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | node-matrix-js-sdk | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | node-matrix-js-sdk | No fix yet | — |
| Ubuntu 22.04 LTS | node-matrix-js-sdk | No fix yet | — |
| Ubuntu 20.04 LTS | node-matrix-js-sdk | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | element-web | 1.8.4-r0 | — |
| Alpine v3.23 | element-web | 1.8.4-r0 | — |
| Alpine v3.22 | element-web | 1.8.4-r0 | — |
| Alpine v3.21 | element-web | 1.8.4-r0 | — |
| Alpine v3.20 | element-web | 1.8.4-r0 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | element-web | 1.8.4-r0 | — |
| Alpine v3.18 | element-web | 1.8.4-r0 | — |
| Alpine v3.17 | riot-web | 1.8.4-r0 | — |
| Alpine v3.16 | riot-web | 1.8.4-r0 | — |
| Alpine v3.15 | riot-web | 1.8.4-r0 | — |
| Alpine v3.14 | riot-web | 1.8.4-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | matrix-js-sdk | < 12.4.1 | 12.4.1 | GHSA-23cm-x6j7-6hq3 |