Vulnerability Details CVE-2019-11340
util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on user@bad.example.net@good.example.com returns the user@bad.example.net substring.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.008
EPSS Ranking 73.7%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 4.3
References
- https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc
- https://github.com/matrix-org/sydent/compare/7c002cd...09278fb
- https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/
- https://twitter.com/matrixdotorg/status/1118934335963500545
- https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc
- https://github.com/matrix-org/sydent/compare/7c002cd...09278fb
- https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/
- https://twitter.com/matrixdotorg/status/1118934335963500545