CVE-2019-11842
matrix-sydent and matrix-synapse Use Cryptographically Weak PRNG
7.5
HIGH
CVSS 3.1
EPSS 0.41%
Description
An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID.
How to fix CVE-2019-11842
To remediate CVE-2019-11842, upgrade the affected package to a fixed version below.
- —upgrade to 0.99.2-5 or later
- —upgrade to 1.0.3 or later
- —upgrade to 0.99.3.1 or later
- —upgrade to 0.99.3.1 or later
Is CVE-2019-11842 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 0.99.2-5
- from 0, < 1.0.3
- from 0, < 0.99.3.1
- from 0, < 0.99.3.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |