CVE-2023-47257
Published: 01 February 2024
Summary
CVE-2023-47257 is a high-severity Code Injection (CWE-94) vulnerability in Connectwise Automate. Its CVSS base score is 8.1 (High).
Operationally, ranked in the top 8.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
ConnectWise ScreenConnect through version 23.8.4 contains a vulnerability that permits man-in-the-middle attackers to achieve remote code execution by sending crafted messages to the application. The flaw is tracked as CVE-2023-47257 with a CVSS 3.1 score of 8.1 and is associated with CWE-94 improper control of generation of code. It affects the ScreenConnect remote access and support product when network communication occurs without sufficient integrity protections.
An unauthenticated network attacker positioned to intercept or modify traffic between ScreenConnect components can supply malicious messages that result in arbitrary code execution on the target system. The attack requires no user interaction or credentials and can lead to full confidentiality, integrity, and availability impacts once code execution is obtained, although the high attack complexity reflects the need for a successful man-in-the-middle position.
The vendor ConnectWise released a security bulletin addressing the issue in the 23.8 release series and advises customers to apply the available updates. Public references also include third-party analysis confirming the same remediation path. The EPSS score has remained flat at 0.0672 with no observed increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-51388
Vulnerability details
ConnectWise ScreenConnect through 23.8.4 allows man-in-the-middle attackers to achieve remote code execution via crafted messages.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Makes persistent code injection into loaded programs impossible when the executable image itself resides on hardware-protected read-only media.
Dynamically generated code can be produced and executed inside the isolated chamber, preventing host compromise from code-injection payloads.
Validates inputs used in dynamic code generation to block injected directives.
Directly prevents execution of attacker-supplied code written into data memory regions.