Published: 21/03/2019 Updated: 07/11/2023

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 445

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Matrix Synapse prior to 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 malicious users to impersonate users.

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matrix synapse
fedoraproject fedora 28
fedoraproject fedora 29

matrix-synapse before 0341 is vulnerable to private key recovery as synapse will attempt to derive a secret key from other secrets specified in the configuration file for "macaroon_secret_key" However, in all versions of Synapse up to and including 0340, this process was faulty and a predictable value was used instead ...

CWE-330 https://matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synapse-affecting-all-versions-prior-to-0-34-1-cve-2019-5885/https://matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-34-1-1/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32Y6KD3OAHCG5P33HC2QEX3NUZOSXCGZ/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMCLO5PUPBA756UKY72PKUWL4RRM4W6K/https://nvd.nist.gov https://security.archlinux.org/CVE-2019-5885

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CVE-2019-5885

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