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.

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.

EPSS: 0.024 (82.3th percentile) — read the EPSS interpretation.

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.

Affected products

Matrix Synapse
Fedoraproject Fedora — versions 28, 29
N/a — versions n/a

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

cve@mitre.org (x_refsource_CONFIRM)
cve@mitre.org (x_refsource_CONFIRM)
cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
cve@mitre.org (x_refsource_CONFIRM, 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.