Improper Verification of Cryptographic Signature The advisory has been revoked - it doesn't affect any version of package matrix-synapse (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1904-MATRIXSYNAPSE-650340
- published25 Sept 2018
- disclosed18 Sept 2018
Introduced: 18 Sep 2018
CVE-2018-16515 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:19.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream matrix-synapse package and not the matrix-synapse package as distributed by Ubuntu.
Matrix Synapse before 0.33.3.1 allows remote attackers to spoof events and possibly have unspecified other impacts by leveraging improper transaction and event signature validation.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-16515
- https://matrix.org/blog/2018/09/06/critical-security-update-synapse-0-33-3-1/
- https://security-tracker.debian.org/tracker/CVE-2018-16515
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IRW7YR2H3ASUSYX4AO4KMY3FNVDNYW3P/
- https://github.com/matrix-org/synapse/issues/3796#event-1833126269
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IRW7YR2H3ASUSYX4AO4KMY3FNVDNYW3P/