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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
mitreCNA
---
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CVEADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 73%
VendorProductVersion
matrixsydent
𝑥
< 1.0.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
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