CORS Misconfiguration in ConnectWise Control by ConnectWise
CVE-2019-16517

9.8CRITICAL

Key Information:

Vendor

Connectwise
Status
Control
Vendor
CVE Published:
23 January 2020

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-16517?

A significant security issue exists in ConnectWise Control that arises from improper Cross-Origin Resource Sharing (CORS) configurations. Specifically, the application reflects the Origin header from incoming requests, enabling any JavaScript running on any external domain to interact with the server's APIs. This vulnerability permits unauthorized users to execute administrative actions without the victim's awareness, posing severe risks to the integrity and security of the managed systems.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-16517 - Proof of Concept

References

https://know.bishopfox.com/advisories
x_refsource_MISC
https://know.bishopfox.com/advisories/connectwise-control
x_refsource_MISC
https://blog.huntresslabs.com/validating-the-bishop-fox-f...
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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