CVE-2019-11340

Description

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.83% Top 30%
Vendor Advisory matrix.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://twitter.com/matrixdotorg/status/1118934335963500545 third party advisory
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/ release notes vendor advisory
https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc third party advisory patch
https://github.com/matrix-org/sydent/compare/7c002cd...09278fb third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2019-11340?
CVE-2019-11340 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11340?
To fix CVE-2019-11340, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11340 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-11340 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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