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GitHub_MVULNRICHMENT:CVE-2023-42803

HistoryOct 30, 2023 - 6:11 p.m.

CVE-2023-42803 BigBlueButton Unrestricted File Upload vulnerability

2023-10-3018:11:35

CWE-434

GitHub_M

github.com

bigbluebutton

unrestricted file upload

version 2.6.0-beta.2

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

25.7%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.2 is vulnerable to unrestricted file upload, where the insertDocument API call does not validate the given file extension before saving the file, and does not remove it in case of validation failures. BigBlueButton 2.6.0-beta.2 contains a patch. There are no known workarounds.

References

github.com/bigbluebutton/bigbluebutton/pull/15990

github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-w98f-6x8w-xhjc

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

25.7%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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