Vulnerability Monitor

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

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 1 product from matrix organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-04-19T14:29:00.417

Last Modified

2024-11-21T04:20:54.877

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	matrix	sydent	< 1.0.2	Yes

References

https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc Patch, Third Party Advisory ([email protected])
https://github.com/matrix-org/sydent/compare/7c002cd...09278fb Patch, Third Party Advisory ([email protected])
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/ Release Notes, Vendor Advisory ([email protected])
https://twitter.com/matrixdotorg/status/1118934335963500545 Third Party Advisory ([email protected])
https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/matrix-org/sydent/compare/7c002cd...09278fb Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/ Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://twitter.com/matrixdotorg/status/1118934335963500545 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For matrix's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.