Home/CVE/util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, i
CVE

CVE-2019-11340

util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, i

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.

MEDIUM · CVSS 5.9 EPSS 0.00665
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

1
matrix sydent< 1.0.2
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI matrix-sydent MODERATE fixed in 1.0.2
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Apr 2019 · 02:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

29
suse-csafopenSUSE-SU-2024:11202-1
suse-csafopenSUSE-SU-2024:11284-1
siemens-csafSSA-398330
suse-csafSUSE-SU-2021:14198-1
suse-csafSUSE-SU-2020:3563-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fcPatchThird Party Advisory
https://github.com/matrix-org/sydent/compare/7c002cd...09278fbPatchThird Party Advisory
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/Release NotesVendor Advisory
https://twitter.com/matrixdotorg/status/1118934335963500545Third Party Advisory
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