CVE-2019-5885
First published: Tue Mar 19 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Matrix Synapse | <0.34.0.1 | |
| Fedoraproject Fedora | =28 | |
| Fedoraproject Fedora | =29 | |
| pip/matrix-synapse | <0.34.0.1 | 0.34.0.1 |
| <0.34.0.1 | ||
| =28 | ||
| =29 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2019-5885
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/32Y6KD3OAHCG5P33HC2QEX3NUZOSXCGZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VMCLO5PUPBA756UKY72PKUWL4RRM4W6K/
- https://matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-34-1-1/
- 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://github.com/matrix-org/synapse/issues/4664
- https://github.com/matrix-org/synapse/blob/67f9e5293ea6650b2ec284c0b7503f3f3eade94b/docs/changelogs/CHANGES-pre-1.0.md?plain=1#L460
- https://github.com/matrix-org/synapse/pull/4315
- https://github.com/matrix-org/synapse/pull/4373
- https://github.com/advisories/GHSA-jrqm-v8cv-53ww (Advisory)
- 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://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2019-187.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/32Y6KD3OAHCG5P33HC2QEX3NUZOSXCGZ
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VMCLO5PUPBA756UKY72PKUWL4RRM4W6K
- https://matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-34-1-1
- 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
Frequently Asked Questions
What is CVE-2019-5885?
CVE-2019-5885 is a vulnerability found in Matrix Synapse before version 0.34.0.1 that allows remote attackers to impersonate users.
How severe is CVE-2019-5885?
CVE-2019-5885 has a severity rating of 7.5 (High).
Which software is affected by CVE-2019-5885?
Matrix Synapse before version 0.34.0.1 and certain versions of Fedora (28 and 29) are affected by CVE-2019-5885.
How can remote attackers exploit CVE-2019-5885?
Remote attackers can exploit CVE-2019-5885 by impersonating users due to the predictable value used to derive secret keys and other secrets.
Are there any remedies for CVE-2019-5885?
Yes, upgrading to version 0.34.0.1 of Matrix Synapse fixes the vulnerability.
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