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GitHub_MCVELIST:CVE-2023-42804

HistoryOct 30, 2023 - 6:14 p.m.

CVE-2023-42804 BigBlueButton Path Traversal – Reading Certain File Extensions

2023-10-3018:14:41

CWE-22

GitHub_M

www.cve.org

bigbluebutton

path traversal

vulnerability

open-source

virtual classroom

input validation

dangerous characters

file extensions

no known workarounds

version 2.6.0-beta.1

CVSS3

3.1

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

AI Score

5.5

Confidence

High

EPSS

0.001

Percentile

26.0%

JSON

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.

CNA Affected

[
  {
    "vendor": "bigbluebutton",
    "product": "bigbluebutton",
    "versions": [
      {
        "version": "< 2.6.0-beta.1",
        "status": "affected"
      }
    ]
  }
]

References

github.com/bigbluebutton/bigbluebutton/pull/15960

github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84

CVSS3

3.1

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

AI Score

5.5

Confidence

High

EPSS

0.001

Percentile

26.0%

JSON

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