myBB 1.6.4 Backdoor Arbitrary Command Execution
Vulnerability Description
myBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code. The backdoor allowed remote attackers to execute arbitrary PHP code by injecting payloads into a specially crafted collapsed cookie. This vulnerability was introduced during packaging and was not part of the intended application logic. Exploitation requires no authentication and results in full compromise of the web server under the context of the web application.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- MyBB
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb
- https://www.exploit-db.com/exploits/17949
- https://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/
- https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/
- https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-execution
Affected Vendor
myBB Group
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