Known exploited vulnerability
CVE-2024-1709
The short answer
CVE-2024-1709 affects ConnectWise ScreenConnect and is rated critical (CVSS 10.0). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-02-22: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
ConnectWise ScreenConnect 23.9.7 and prior are affected by an Authentication Bypass Using an Alternate Path or Channel vulnerability, which may allow an attacker direct access to confidential information or critical systems.
Weakness: CWE-288.
Severity
10.0 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Feb 22, 2024
Federal due date Feb 29, 2024
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected products
ScreenConnect, screenconnect. NVD's record lists the exact affected versions.
References
- github.com/rapid7/metasploit-framework/pull/18870 Issue TrackingPatchThird Party Advisory
- github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc ExploitThird Party Advisory
- techcrunch.com/2024/02/21/researchers-warn-high-risk-connectwise-flaw-under-attack-is-embarrassingly-easy-to-exploit/ Press/Media CoverageThird Party Advisory
- www.bleepingcomputer.com/news/security/connectwise-urges-screenconnect-admins-to-patch-critical-rce-flaw/ Press/Media CoverageThird Party Advisory
- www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8 Vendor Advisory
- www.horizon3.ai/attack-research/red-team/connectwise-screenconnect-auth-bypass-deep-dive/ Third Party Advisory
- www.huntress.com/blog/a-catastrophe-for-control-understanding-the-screenconnect-authentication-bypass ExploitThird Party Advisory
- www.huntress.com/blog/detection-guidance-for-connectwise-cwe-288-2 ExploitThird Party Advisory
- www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8 Third Party Advisory
- www.securityweek.com/connectwise-confirms-screenconnect-flaw-under-active-exploitation/ Press/Media CoverageThird Party Advisory
- github.com/rapid7/metasploit-framework/pull/18870 Issue TrackingPatchThird Party Advisory
- github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc ExploitThird Party Advisory
Questions
Is CVE-2024-1709 being exploited?
Yes. CISA added CVE-2024-1709 to its Known Exploited Vulnerabilities catalog on 2024-02-22, with a federal remediation due date of 2024-02-29. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2024-1709?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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