CVE-2021-21274
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-21274
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-21274.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-21274
- Aliases
- Related
- Published
- 2021-02-26T18:15:12Z
- Modified
- 2024-10-16T17:49:23.597165Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.25.0, a malicious homeserver could redirect requests to their .well-known file to a large file. This can lead to a denial of service attack where homeservers will consume significantly more resources when requesting the .well-known file of a malicious homeserver. This affects any server which accepts federation requests from untrusted servers. Issue is resolved in version 1.25.0. As a workaround the
federation_domain_whitelistsetting can be used to restrict the homeservers communicated with over federation. - References
-
- https://github.com/matrix-org/synapse/security/advisories/GHSA-2hwx-mjrm-v3g8
- https://github.com/matrix-org/synapse/commit/ff5c4da1289cb5e097902b3e55b771be342c29d6
- https://github.com/matrix-org/synapse/pull/8950
- https://github.com/matrix-org/synapse/releases/tag/v1.25.0
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/
- https://security-tracker.debian.org/tracker/CVE-2021-21274
Affected packages
Debian:13 / matrix-synapse
Package
- Name
- matrix-synapse
- Purl
- pkg:deb/debian/matrix-synapse?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.25.0-1
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
1.20.0-1
1.20.1-1~bpo10+1
1.20.1-1
1.21.1-1
1.21.2-1~bpo10+1
1.21.2-1
1.22.1-1~bpo10+1
1.22.1-1
1.22.1-2~bpo10+1
1.22.1-2
1.23.0-1~bpo10+1
1.23.0-1
1.24.0-1~bpo10+1
1.24.0-1
1.24.0-2
1.25.0-1~bpo10+1
Git / github.com/matrix-org/synapse
Affected ranges
- Type
- GIT
- Repo
- https://github.com/matrix-org/synapse
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
0.*
0.34.0rc2
1.*
1.7.2
Other
alpha
hhs-1
hhs-2
hhs-3
hhs-4
hhs-5
hhs-6
hhs-7
hhs-8
v0.*
v0.0.0
v0.0.1
v0.1.0
v0.1.1
v0.1.2
v0.10.0
v0.10.0-r1
v0.10.0-r2
v0.10.0-rc1
v0.10.0-rc2
v0.10.0-rc3
v0.10.0-rc4
v0.10.0-rc5
v0.10.0-rc6
v0.10.1-rc1
v0.11.0
v0.11.0-r1
v0.11.0-r2
v0.11.0-rc1
v0.11.0-rc2
v0.11.1
v0.12.0
v0.12.0-rc1
v0.12.0-rc2
v0.12.0-rc3
v0.12.1-rc1
v0.13.0
v0.13.1
v0.13.2
v0.13.3
v0.14.0
v0.14.0-rc1
v0.14.0-rc2
v0.15.0-rc1
v0.16.0
v0.16.0-rc1
v0.16.0-rc2
v0.16.1
v0.16.1-r1
v0.16.1-rc1
v0.17.0
v0.17.0-rc1
v0.17.0-rc2
v0.17.0-rc3
v0.17.0-rc4
v0.17.1
v0.17.1-rc1
v0.17.2
v0.17.2-rc1
v0.17.3
v0.18.0
v0.18.0-rc1
v0.18.1
v0.18.1-rc1
v0.18.2
v0.18.2-rc1
v0.18.2-rc2
v0.18.2-rc3
v0.18.2-rc4
v0.18.2-rc5
v0.18.3
v0.18.4
v0.18.4-rc1
v0.18.5
v0.18.5-rc1
v0.18.5-rc2
v0.18.5-rc3
v0.18.6
v0.18.6-rc1
v0.18.6-rc2
v0.18.6-rc3
v0.18.7
v0.18.7-rc1
v0.18.7-rc2
v0.19.0
v0.19.0-rc1
v0.19.0-rc2
v0.19.0-rc3
v0.19.0-rc4
v0.19.1
v0.19.2
v0.19.3
v0.19.3-rc1
v0.19.3-rc2
v0.2.0
v0.2.1
v0.2.1a
v0.2.2
v0.2.3
v0.20.0
v0.20.0-rc1
v0.21.0
v0.21.0-rc1
v0.21.0-rc2
v0.21.0-rc3
v0.21.1
v0.22.0
v0.22.0-rc1
v0.22.0-rc2
v0.22.1
v0.23.0
v0.23.0-rc1
v0.23.0-rc2
v0.23.1
v0.24.0
v0.24.0-rc1
v0.24.1
v0.25.0
v0.25.0-rc1
v0.25.1
v0.26.0
v0.26.0-rc1
v0.26.1
v0.27.0
v0.27.0-rc1
v0.27.0-rc2
v0.27.1
v0.27.2
v0.27.3
v0.27.3-rc1
v0.27.3-rc2
v0.27.4
v0.28.0
v0.28.0-rc1
v0.28.1
v0.29.0
v0.29.0-rc1
v0.29.1
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.30.0
v0.30.0-rc1
v0.31.0
v0.31.0-rc1
v0.31.1
v0.31.2
v0.32.0
v0.32.0rc1
v0.32.1
v0.32.2
v0.33.0
v0.33.0rc1
v0.33.1
v0.33.2
v0.33.2rc1
v0.33.3
v0.33.3.1
v0.33.3rc1
v0.33.3rc2
v0.33.4
v0.33.4rc1
v0.33.4rc2
v0.33.5
v0.33.5.1
v0.33.5rc1
v0.33.6
v0.33.6rc1
v0.33.7
v0.33.7rc1
v0.33.7rc2
v0.33.8
v0.33.8rc1
v0.33.8rc2
v0.33.9
v0.33.9rc1
v0.34.0
v0.34.0rc1
v0.34.0rc2
v0.34.1
v0.34.1+1
v0.34.1.1
v0.34.1rc1
v0.4.1
v0.4.2
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.5.3a
v0.5.3b
v0.5.3c
v0.5.4
v0.5.4a
v0.6.0
v0.6.0a
v0.6.0b
v0.6.1
v0.6.1a
v0.6.1b
v0.6.1c
v0.6.1d
v0.6.1e
v0.6.1f
v0.7.0
v0.7.0a
v0.7.0b
v0.7.0c
v0.7.0d
v0.7.0e
v0.7.0f
v0.7.1
v0.7.1-r1
v0.7.1-r2
v0.7.1-r3
v0.7.1-r4
v0.8.0
v0.8.1
v0.8.1-r1
v0.8.1-r2
v0.8.1-r3
v0.8.1-r4
v0.9.0
v0.9.0-r1
v0.9.0-r2
v0.9.0-r3
v0.9.0-r4
v0.9.0-r5
v0.9.1
v0.9.2
v0.9.2-r1
v0.9.2-r2
v0.9.3
v0.9.3-rc1
v0.99.0
v0.99.0rc1
v0.99.0rc2
v0.99.0rc3
v0.99.0rc4
v0.99.1
v0.99.1.1
v0.99.1rc1
v0.99.1rc2
v0.99.2
v0.99.2rc1
v0.99.3
v0.99.3.1
v0.99.3.2
v0.99.3rc1
v0.99.4
v0.99.4rc1
v0.99.5
v0.99.5.1
v0.99.5.1.dev0
v0.99.5.2
v0.99.5rc1
v1.*
v1.0.0
v1.0.0rc1
v1.0.0rc2
v1.0.0rc3
v1.1.0
v1.1.0rc1
v1.1.0rc2
v1.10.0
v1.10.0rc1
v1.10.0rc2
v1.10.0rc3
v1.10.0rc5
v1.10.1
v1.11.0
v1.11.0rc1
v1.11.1
v1.12.0
v1.12.0rc1
v1.12.1
v1.12.1rc1
v1.12.2
v1.12.3
v1.12.4
v1.12.4rc1
v1.13.0
v1.13.0rc1
v1.13.0rc2
v1.13.0rc3
v1.14.0
v1.14.0rc1
v1.14.0rc2
v1.15.0
v1.15.0rc1
v1.15.1
v1.15.2
v1.16.0
v1.16.0rc1
v1.16.0rc2
v1.16.1
v1.17.0
v1.17.0rc1
v1.18.0
v1.18.0rc1
v1.18.0rc2
v1.19.0
v1.19.0rc1
v1.19.1
v1.19.1rc1
v1.19.2
v1.19.3
v1.2.0
v1.2.0rc1
v1.2.0rc2
v1.2.1
v1.20.0
v1.20.0rc1
v1.20.0rc2
v1.20.0rc3
v1.20.0rc4
v1.20.0rc5
v1.20.1
v1.21.0
v1.21.0rc1
v1.21.0rc2
v1.21.0rc3
v1.21.1
v1.21.2
v1.22.0
v1.22.0rc1
v1.22.0rc2
v1.22.1
v1.23.0
v1.23.0rc1
v1.23.1
v1.24.0
v1.24.0rc1
v1.24.0rc2
v1.3.0
v1.3.0rc1
v1.3.1
v1.4.0
v1.4.0rc1
v1.4.0rc2
v1.4.1
v1.4.1rc1
v1.5.0
v1.5.0rc1
v1.5.0rc2
v1.5.1
v1.6.0
v1.6.0rc1
v1.6.0rc2
v1.6.1
v1.7.0
v1.7.0rc1
v1.7.0rc2
v1.7.1
v1.7.2
v1.7.3
v1.8.0
v1.8.0rc1
v1.9.0
v1.9.0.dev1
v1.9.0.dev2
v1.9.0rc1
v1.9.1