Executive Summary

Informations
Name CVE-2020-27604 First vendor Publication 2020-10-21
Vendor Cve Last vendor Modification 2020-10-30

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Overall CVSS Score 6.5
Base Score 6.5 Environmental Score 6.5
impact SubScore 3.6 Temporal Score 6.5
Exploitabality Sub Score 2.8
 
Attack Vector Network Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact None Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:P/I:N/A:N)
Cvss Base Score 4 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

BigBlueButton before 2.3 does not implement LibreOffice sandboxing. This might make it easier for remote authenticated users to read the API shared secret in the bigbluebutton.properties file. With the API shared secret, an attacker can (for example) use api/join to join an arbitrary meeting regardless of its guestPolicy setting.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27604

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-116 Improper Encoding or Escaping of Output

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1

Sources (Detail)

Source Url
MISC https://docs.bigbluebutton.org/dev/api.html
https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-...

Alert History

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Date Informations
2021-05-04 13:52:27
  • Multiple Updates
2021-04-22 03:03:17
  • Multiple Updates
2020-11-01 17:23:01
  • Multiple Updates
2020-10-21 21:23:37
  • First insertion