Email Domain Misconfiguration in Matrix Sydent by Matrix
CVE-2019-11340

5.9MEDIUM

Key Information:

Vendor

Matrix

Status
Sydent
Vendor
CVE Published:
19 April 2019

What is CVE-2019-11340?

The Matrix Sydent service, specifically the util/emailutils.py module, has a vulnerability that arises from improper handling of registration restrictions tied to email domains. When the allowed_local_3pids option is enabled, the email.utils.parseaddr function can yield unexpected results. This could allow a user to bypass intended restrictions by using email formats that confuse the parser, potentially leading to unwanted registrations with unauthorized domains.

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References

https://twitter.com/matrixdotorg/status/1118934335963500545
x_refsource_MISC
https://matrix.org/blog/2019/04/18/security-update-sydent...
x_refsource_MISC
https://github.com/matrix-org/sydent/commit/4e1cfff53429c...
x_refsource_MISC

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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