CVE-2021-27471

Summary

The parsing mechanism that processes certain file types does not provide input sanitization for file paths. This may allow an attacker to craft malicious files that, when opened by Rockwell Automation Connected Components Workbench v12.00.00 and prior, can traverse the file system. If successfully exploited, an attacker could overwrite existing files and create additional files with the same permissions of the Connected Components Workbench software. User interaction is required for this exploit to be successful.

Affected Software

VendorProductVersion RangeStatus
Rockwell AutomationConnected Components Workbenchunspecified <= v12.00.00affected

Weaknesses

  • CWE-22: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Workarounds

Users who are unable to update are directed towards risk mitigation strategies provided below, and are encouraged, when possible, to combine these with Rockwell Automation’s general security guidelines to employ multiple strategies simultaneously. If upgrade is not possible, Rockwell Automation recommends deploying the following mitigations: Run Connected Components Workbench as a User, not as an Administrator, to minimize the impact of malicious code on the infected system. Do not open untrusted .ccwarc, files with Connected Components Workbench. Employ training and awareness programs to educate users on the warning signs of a phishing or social engineering attack. Use of Microsoft AppLocker or other similar allow list applications can help mitigate risk. Information on using AppLocker with Rockwell Automation products is available at KnowledgeBase Article QA17329 (login required). Ensure the least-privilege user principle is followed, and user/service account access to shared resources (such as a database) is only granted with a minimum number of rights as needed.

For more information, please see the industrial security advisory from Rockwell Automation.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References