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GitHub_MVULNRICHMENT:CVE-2023-43798

HistoryOct 30, 2023 - 10:24 p.m.

CVE-2023-43798 BigBlueButton Blind SSRF When Uploading Presentation (mitigation bypass)

2023-10-3022:24:59

CWE-918

GitHub_M

github.com

bigbluebutton

ssrf

bypass

cve-2023-43798

CVSS3

5.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

AI Score

6.7

Confidence

Low

EPSS

0.001

Percentile

41.9%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at httpclient.execute since the software no longer has to follow it when using finalUrl. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.

References

github.com/bigbluebutton/bigbluebutton/pull/18494

github.com/bigbluebutton/bigbluebutton/pull/18580

github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3q22-hph2-cff7

github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-h98v-2h8w-99c4

CVSS3

5.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

AI Score

6.7

Confidence

Low

EPSS

0.001

Percentile

41.9%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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