5.3

CVE-2023-42804

BigBlueButton Path Traversal – Reading Certain File Extensions

Path Traversal – Reading Certain File Extensions

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.1 has a path traversal vulnerability that allows an attacker with a valid starting folder path, to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped. There are no known workarounds.
Mögliche Gegenmaßnahme
Server: There are no workarounds. We recommend upgrading to a patched version of BigBlueButton.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
BigBlueButton ≫ BigBlueButton Version <= 2.5.18
BigBlueButton ≫ BigBlueButton Version2.6.0 Updatealpha1
BigBlueButton ≫ BigBlueButton Version2.6.0 Updatealpha2
BigBlueButton ≫ BigBlueButton Version2.6.0 Updatealpha3
BigBlueButton ≫ BigBlueButton Version2.6.0 Updatealpha4
Weitere Schwachstelleninformationen
SystemBigBlueButton
≫
Produkt Server
Version < 2.6.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.46% 0.36
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
security-advisories@github.com 3.1 1.6 1.4
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

https://github.com/bigbluebutton/bigbluebutton/pull/15960
Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84
Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84
Third Party Advisory