Medium severity · published Apr 19, 2019
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
5.9
CVSS
1.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SY
Sydent · Matrix
before 1.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-11340
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-11340
Patch
https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc
Patch
https://github.com/matrix-org/sydent/compare/7c002cd...09278fb
Release Notes
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/
Third Party Advisory
https://twitter.com/matrixdotorg/status/1118934335963500545
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