DEBIAN-CVE-2020-26890

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Source
https://security-tracker.debian.org/tracker/CVE-2020-26890
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2020-26890.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2020-26890
Upstream
Published
2020-11-24T03:15:13Z
Modified
2025-10-18T08:32:53.884381Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote attackers to execute a denial of service attack against the federation and common Matrix clients. If such a malformed event is accepted into the room's state, the impact is long-lasting and is not fixed by an upgrade to a newer version, requiring the event to be manually redacted instead. Since events are replicated to servers of other room members, the impact is not constrained to the server of the event sender.

References

Affected packages

Debian:14 / matrix-synapse

Package

Name
matrix-synapse
Purl
pkg:deb/debian/matrix-synapse?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.0-1

Affected versions

0.*

0.19.2+dfsg-3
0.19.2+dfsg-4
0.19.2+dfsg-5
0.19.2+dfsg-6
0.24.0+dfsg-1
0.27.2+dfsg-1
0.28.0+dfsg-1
0.28.0+dfsg-2
0.28.1+dfsg-1
0.29.1+dfsg-1
0.30.0+dfsg-1
0.31.0+dfsg-1
0.31.0+dfsg-2
0.31.1+dfsg-1
0.31.1+dfsg-2
0.31.2+dfsg-1
0.32.2+dfsg-1
0.33.0+dfsg-1
0.33.1+dfsg-1
0.33.2+dfsg-1
0.33.2+dfsg-2
0.33.2+dfsg-3
0.33.3-1
0.33.3-2
0.33.3.1-1
0.33.4-1~bpo9+1
0.33.4-1
0.33.8-1
0.33.9-2~bpo9+1
0.33.9-2
0.34.0~rc2-1
0.34.0-1
0.34.0-2
0.34.0-3~bpo9+1
0.34.0-3~bpo9+2
0.34.0-3
0.34.1.1-1
0.34.1.1-2~bpo9+1
0.34.1.1-2
0.34.1.1-3~bpo9+1
0.34.1.1-3~bpo9+2
0.34.1.1-3
0.34.1.1-4
0.99.0-1~bpo9+1
0.99.0-1~bpo9+2
0.99.0-1~bpo9+3
0.99.0-1
0.99.1.1-1
0.99.2-1~bpo9+1
0.99.2-1~bpo9+2
0.99.2-1
0.99.2-2
0.99.2-3
0.99.2-4
0.99.2-5~bpo9+1
0.99.2-5
0.99.2-6
0.99.3.2-1
0.99.5.1-1
0.99.5.2-1

1.*

1.0.0-1
1.0.0-2~bpo10+1
1.0.0-2
1.1.0-1
1.2.1-1~bpo10+1
1.2.1-1~bpo10+2
1.2.1-1
1.2.1-2
1.3.0-1~bpo10+1
1.3.0-1
1.4.0~rc1-1
1.4.0-1
1.5.0~rc1-1
1.5.0-1
1.5.1-1~bpo10+1
1.5.1-1
1.6.0-1
1.6.1-1~bpo10+1
1.6.1-1
1.7.0-1
1.7.0-2
1.7.1-1
1.7.2-1~bpo10+1
1.7.2-1
1.7.3-1~bpo10+1
1.7.3-1
1.8.0-1
1.9.0-1~bpo10+1
1.9.0-1
1.9.1-1~bpo10+1
1.9.1-1
1.10.0-1
1.10.0-2
1.11.0-1
1.11.1-1~bpo10+1
1.11.1-1
1.12.0-1~bpo10+1
1.12.0-1
1.12.3-1~bpo10+1
1.12.3-1
1.12.4-1~bpo10+1
1.12.4-1
1.13.0-1~bpo10+1
1.13.0-1
1.15.0-1
1.15.1-1~bpo10+1
1.15.1-1~bpo10+2
1.15.1-1
1.15.2-1
1.16.0-1
1.17.0-1~bpo10+1
1.17.0-1
1.18.0-1~bpo10+1
1.18.0-1
1.19.0-1~bpo10+1
1.19.0-1
1.19.1-1~bpo10+1
1.19.1-1~bpo10+2
1.19.1-1~bpo10+3
1.19.1-1
1.19.2-1
1.19.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}