CVE-2019-11340

Advisory

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 [email protected]@good.example.com returns the [email protected] substring. See: CVE-2019-11340.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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 [email protected]@good.example.com returns the [email protected] substring.


MISC:https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc: https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc
MISC:https://github.com/matrix-org/sydent/compare/7c002cd...09278fb: https://github.com/matrix-org/sydent/compare/7c002cd...09278fb
MISC:https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/: https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/
MISC:https://twitter.com/matrixdotorg/status/1118934335963500545: https://twitter.com/matrixdotorg/status/1118934335963500545

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11340
• https://twitter.com/matrixdotorg/status/1118934335963500545
• https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/
• https://github.com/matrix-org/sydent/compare/7c002cd...09278fb
• https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc