Description
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.
References (4)
Core 4
Core References
Mailing List, Third Party Advisory x_refsource_confirm
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32Y6KD3OAHCG5P33HC2QEX3NUZOSXCGZ/
Mailing List, Third Party Advisory x_refsource_confirm
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMCLO5PUPBA756UKY72PKUWL4RRM4W6K/
Vendor Advisory x_refsource_confirm
https://matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-34-1-1/
Vendor Advisory x_refsource_confirm
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/
Scores
CVSS v3
7.5
EPSS
0.0242
EPSS Percentile
82.0%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
CWE
CWE-330
Status
published
Products (4)
fedoraproject/fedora
28
fedoraproject/fedora
29
matrix/synapse
< 0.34.0.1
pypi/matrix-synapse
0 - 0.34.0.1PyPI
Published
Mar 21, 2019
Tracked Since
Feb 18, 2026