Vulnerability in Matrix Synapse
CVE-2019-5885
Matrix Synapse before 0.34.0.1, when the macaroon_secret_key authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.024 (83.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
- Matrix Synapse
- Fedoraproject Fedora — versions 28, 29
Weakness classification (CWE)
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
- matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-… (Vendor Advisory)
- matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synap… (Vendor Advisory)
Frequently asked questions
- What is CVE-2019-5885?
- CVE-2019-5885 is a high-severity vulnerability in Matrix Synapse, classified under Use of Insufficiently Random Values. CVSS score: 7.5/10. Published 2019-03-21.
- How severe is CVE-2019-5885?
- High severity. CVSS v3 base score is 7.5 out of 10.