Multiple vulnerabilities in BigBlueButton plugin for WordPress



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-29042
CVE-2020-29043
CWE-ID CWE-307
CWE-862
Exploitation vector Network
Public exploit N/A
Vulnerable software
 BigBlueButton
Web applications / Modules and components for CMS

Vendor Blindside Networks

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Restriction of Excessive Authentication Attempts

EUVDB-ID: #VU48705

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-29042

CWE-ID: CWE-307 - Improper Restriction of Excessive Authentication Attempts

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to the system.

The vulnerability exists due to the two-factor authentication has no brute-force prevention. A remote attacker can launch a brute-force authentication attack and gain access to the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BigBlueButton: 0.7 - 3.0.0 beta.4

CPE2.3 External links

http://packetstormsecurity.com/files/160238/BigBlueButton-2.2.29-Brute-Force.html
http://cxsecurity.com/issue/WLB-2020110210
http://github.com/bigbluebutton/bigbluebutton/releases


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Missing Authorization

EUVDB-ID: #VU48706

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-29043

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system. 

The vulnerability exists due to missing authorization in the "account_activations/edit?token=" URI. A remote attacker can create an approved user account associated with an email address that has an arbitrary domain name.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BigBlueButton: 0.7 - 3.0.0 beta.4

CPE2.3 External links

http://packetstormsecurity.com/files/160239/BigBlueButton-2.2.29-E-mail-Validation-Bypass.html
http://cxsecurity.com/issue/WLB-2020110211
http://github.com/bigbluebutton/bigbluebutton/releases


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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