myBB 1.6.4 Backdoor Arbitrary Command Execution
63Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 10epss 2.0%
from disclosure to weapon0 days
Published on NVDAug 13
metasploitOct 6
exploitation probability
2.0%top 21% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
myBB Group · Forum Softwarepublic PoCs found — 2
cve_referenceraw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rbunverifiedcve_referencewww.exploit-db.com/exploits/17949unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rbhttps://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/https://www.exploit-db.com/exploits/17949https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-execution