Vulnerability Name:

CVE-2019-11842 (CCN-160942)

Assigned:2019-05-03
Published:2019-05-03
Updated:2019-05-10
Summary:An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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): High
Integrity (I): None
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:L/I:N/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:L/I:N/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): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-338
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2019-11842

Source: XF
Type: UNKNOWN
matrix-cve201911842-info-disc(160942)

Source: CCN
Type: Matrix Web site
An open network for secure, decentralized communication.

Source: CCN
Type: Matrix Blog, 05/03/2019
Sydent 1.0.3, Synapse 0.99.3.1 and Riot/Android 0.9.0 / 0.8.99 / 0.8.28a

Source: MISC
Type: Vendor Advisory
https://matrix.org/blog/2019/05/03/security-updates-sydent-1-0-3-synapse-0-99-3-1-and-riot-android-0-9-0-0-8-99-0-8-28-a/

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-11842

Vulnerable Configuration:Configuration 1:
  • cpe:/a:matrix:sydent:*:*:*:*:*:*:*:* (Version < 1.0.3)
  • OR cpe:/a:matrix:synapse:*:*:*:*:*:*:*:* (Version < 0.99.3.1)

    • Configuration CCN 1:
  • cpe:/a:matrix:sydent:1.0.2:*:*:*:*:*:*:*
  • OR cpe:/a:matrix:synapse:0.99.2:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.cosmic:def:2019118420000000
    V
    		CVE-2019-11842 on Ubuntu 18.10 (cosmic) - untriaged.
    2019-05-09
    oval:com.ubuntu.bionic:def:2019118420000000
    V
    		CVE-2019-11842 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-05-09
    oval:com.ubuntu.disco:def:2019118420000000
    V
    		CVE-2019-11842 on Ubuntu 19.04 (disco) - medium.
    2019-05-09
    BACK
    matrix sydent *
    matrix synapse *
    matrix sydent 1.0.2
    matrix synapse 0.99.2 -