PT-2020-16712 · Bigbluebutton · Bigbluebutton

Published 2020-10-21 · Updated 2022-10-03 · CVE-2020-27602

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions BigBlueButton versions prior to 2.2.7

Description The issue is related to a lack of protection mechanism for separator injection in meetingId, userId, and authToken. This affects the security of the system.

Recommendations For versions prior to 2.2.7, update to version 2.2.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the meetingId, userId, and authToken parameters to minimize the risk of exploitation.

Fix

Special Elements Injection

Weakness Enumeration

CWE-74

Related Identifiers

CVE-2020-27602

Affected Products

Bigbluebutton

References · 5

• https://github.com/bigbluebutton/bigbluebutton/commit/4bfd924c64da2681f4c037026021f47eb189d717 · Patch
• https://osv.dev/vulnerability/CVE-2020-27602 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-27602 · Security Note
• https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.6...v2.2.7 · Note
• https://t.me/cibsecurity/50706 · Telegram Post