Last updated at Wed, 08 Feb 2023 18:17:11 GMT
Emergent threats evolve quickly, and as we learn more about this vulnerability, this blog post will evolve, too.
Rapid7 is responding to various compromises arising from the exploitation of CVE-2022-21587, a critical arbitrary file upload vulnerability (rated 9.8 on the CVSS v3 risk metric) impacting Oracle E-Business Suite (EBS). Oracle published a Critical Patch Update Advisory in October 2022 which included a fix, meanwhile, CISA added CVE-2022-21587 to its Known Exploited Vulnerabilities (KEV) catalog on February 2, 2023.
Oracle E-Business Suite is a packaged collection of enterprise applications for a wide variety of tasks such as customer relationship management (CRM), enterprise resource planning (ERP), and human capital management (HCM).
CVE-2022-21587 can lead to unauthenticated remote code execution.
On January 16, 2023, Viettel Security published an analysis of the issue detailing both the vulnerability's root cause and a method of leveraging the vulnerability to gain code execution. An exploit based on the Viettel Security analysis technique was published on GitHub by “HMs” on February 6, 2023.
On February 8, 2023, Rapid7 posted a technical analysis of CVE-2022-21587 on AttackerKB. Of particular note, we found that it is possible to upload arbitrary Java Server Pages (JSP) allowing for exploitation beyond the Perl web shell that has been observed so far.
- Oracle Web Applications Desktop Integrator as shipped with Oracle E-Business Suite versions 12.2.3 through 12.2.11 are vulnerable.
What we’re seeing
The attacker(s) are using the above-mentioned proof of concept exploit, uploading a perl script, which fetches (via curl/wget) additional scripts to download a malicious binary payload making the victim host part of a botnet.
InsightVM & Nexpose customers: Authenticated vulnerability checks for CVE-2022-21587 have been available since November 2022. Note that these require valid Oracle Database credentials to be configured in order to collect the relevant patch level information.
InsightIDR & Managed Detection & Response (MDR) customers: in our current investigations, the previously existing detections have been triggering post exploitation:
Suspicious Process - Wget to External IP Address
Attacker Technique - Curl or Wget To Public IP Address With Non Standard Port
We’re also testing new rules more specific to Oracle E-Business Suite.
February 8, 2023 18:15 UTC
- Rapid7 has posted a technical analysis of CVE-2022-21587 on AttackerKB. Of particular note, we found that it is possible to upload arbitrary Java Server Pages (JSP) allowing for exploitation beyond the Perl web shell that has been observed so far.