CVE-2019-18835 — Insufficient Verification of Data Authenticity in Synapse

CWE-345 — Insufficient Verification of Data AuthenticityCWE-347 — Improper Verification of Cryptographic Signature10 documents7 sources
Severity
9.8CRITICALNVD
OSV7.5
EPSS
0.2%
top 62.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Matrix Synapse
Timeline
PublishedNov 8
Latest updateMay 16

Description

Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages1 packages

▶NVDmatrix/synapse< 1.5.0

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

5
OSV
matrix-synapse vulnerabilities↗2023-05-16
▶
OSV
Improper Verification of Cryptographic Signature in matrix-synapse↗2022-05-24
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GHSA
Improper Verification of Cryptographic Signature in matrix-synapse↗2022-05-24
▶
OSV
CVE-2019-18835: Matrix Synapse before 1↗2019-11-08
▶
CVEList
CVE-2019-18835: Matrix Synapse before 1↗2019-11-07
▶

📋Vendor Advisories

2
Ubuntu
Synapse vulnerabilities↗2023-05-16
▶
Debian
CVE-2019-18835: matrix-synapse - Matrix Synapse before 1.5.0 mishandles signature checking on some federation API...↗2019
▶

💬Community

2
Bugzilla
CVE-2019-18835 matrix-synapse: mishandles signature checking on some federation APIs [fedora-all]↗2019-11-08
▶
Bugzilla
CVE-2019-18835 matrix-synapse: mishandles signature checking on some federation APIs↗2019-11-08
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CVE-2019-18835 — Matrix Synapse vulnerability | cvebase