ALPINE-CVE-2021-40823

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Source
https://security.alpinelinux.org/vuln/CVE-2021-40823
Import Source
https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json
JSON Data
https://api.osv.dev/v1/vulns/ALPINE-CVE-2021-40823
Upstream
Published
2021-09-13T19:15:19Z
Modified
2026-11-03T06:32:41Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Alpine:v3.14
riot-web

Package

Name
riot-web
Purl
pkg:apk/alpine/riot-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.15
riot-web

Package

Name
riot-web
Purl
pkg:apk/alpine/riot-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.16
riot-web

Package

Name
riot-web
Purl
pkg:apk/alpine/riot-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.17
riot-web

Package

Name
riot-web
Purl
pkg:apk/alpine/riot-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.18
element-web

Package

Name
element-web
Purl
pkg:apk/alpine/element-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.19
element-web

Package

Name
element-web
Purl
pkg:apk/alpine/element-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.20
element-web

Package

Name
element-web
Purl
pkg:apk/alpine/element-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.21
element-web

Package

Name
element-web
Purl
pkg:apk/alpine/element-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.22
element-web

Package

Name
element-web
Purl
pkg:apk/alpine/element-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.23
element-web

Package

Name
element-web
Purl
pkg:apk/alpine/element-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"
Alpine:v3.24
element-web

Package

Name
element-web
Purl
pkg:apk/alpine/element-web?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.4-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-40823.json"