CVE-2019-16517

Public Exploit

Description

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected the Origin provided by incoming requests. This allowed JavaScript running on any domain to interact with the server APIs and perform administrative actions, without the victim's knowledge.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.22%
Third-Party Advisory huntresslabs.com Third-Party Advisory bishopfox.com Third-Party Advisory bishopfox.com Third-Party Advisory crn.com Third-Party Advisory crn.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://know.bishopfox.com/advisories third party advisory
https://know.bishopfox.com/advisories/connectwise-control third party advisory exploit
https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34 third party advisory exploit
https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox third party advisory
https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-researcher-bishop-fox third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-16517?
CVE-2019-16517 has been scored as a critical severity vulnerability.
How to fix CVE-2019-16517?
To fix CVE-2019-16517, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-16517 being actively exploited in the wild?
It is possible that CVE-2019-16517 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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