CVE-2019-18835
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
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.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-18835
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | forky | fixed | 1.5.0-1 |
| debian | sid | fixed | 1.5.0-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | matrix-synapse | <1.5.0 | 1.5.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2019-18835
- https://github.com/matrix-org/synapse/pull/6262
- https://github.com/matrix-org/synapse/commit/172f264ed38e8bef857552f93114b4ee113a880b
- https://github.com/matrix-org/synapse
- https://github.com/matrix-org/synapse/releases/tag/v1.5.0
- https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2019-186.yaml
- https://github.com/advisories/GHSA-cppw-2mf8-qpm5
- https://security-tracker.debian.org/tracker/CVE-2019-18835
Verify integrity in audit chain (admin only). AS-IS.