Vulnerability Name:

CVE-2019-11340 (CCN-160071)

Assigned:2019-04-18
Published:2019-04-18
Updated:2019-04-22
Summary: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 v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-20
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2019-11340

Source: XF
Type: UNKNOWN
matrix-sydent-cve201911340-sec-bypass(160071)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/matrix-org/sydent/compare/7c002cd...09278fb

Source: CCN
Type: Matrix Blog, 04/18/2019
Security Update: Sydent 1.0.2

Source: MISC
Type: Release Notes, Vendor Advisory
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/

Source: CCN
Type: Matrix Web site
sydent

Source: MISC
Type: Third Party Advisory
https://twitter.com/matrixdotorg/status/1118934335963500545

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-11340

Vulnerable Configuration:Configuration 1:
  • cpe:/a:matrix:sydent:*:*:*:*:*:*:*:* (Version < 1.0.2)

    • Configuration CCN 1:
  • cpe:/a:matrix:sydent:1.0.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    matrix sydent *
    matrix sydent 1.0.1