CVE-2021-42258

Vulnerability ID

CVE-2021-42258

Severity

CRITICAL

Severity Score

9.8

Summary

BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution, as exploited in the wild in October 2021 for ransomware installation. SQL injection can, for example, use the txtID (aka username) parameter. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell.

References

https://www.huntress.com/blog/threat-advisory-hackers-are-exploiting-a-vulnerability-in-popular-billing-software-to-deploy-ransomware

Mitigation and Patches

-

Exploits

https://www.huntress.com/blog/threat-advisory-hackers-are-exploiting-a-vulnerability-in-popular-billing-software-to-deploy-ransomware

https://nvd.nist.gov/vuln/detail/CVE-2021-42258

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/gather/billquick_txtid_sqli.rb

Metasploit Payload

https://www.huntress.com/blog/threat-advisory-hackers-are-exploiting-a-vulnerability-in-popular-billing-software-to-deploy-ransomware

http://billquick.net/download/Support_Download/BQWS2021Upgrade/WebSuite2021LogFile_9_1.pdf