Exploited vulnerability · CISA KEV

Is CVE-2018-20753 exploited? Yes: in CISA KEV since 13 Apr 2022

Gociux · Kaseya Virtual System/Server Administrator (VSA) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-20753, Kaseya VSA Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 13 Apr 2022, 1163 days after it was published. It is known to be used in ransomware campaigns. It affects Kaseya Virtual System/Server Administrator (VSA). If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

Kaseya VSA RMM allows unprivileged remote attackers to execute PowerShell payloads on all managed devices.

What to do

1. Check whether you run it. Look for Virtual System/Server Administrator (VSA) in your asset inventory, including appliances and cloud images. Stack check lists every exploited Kaseya CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 5 Feb 2019.
4. Get told next time. Email alerts when CISA adds a CVE for Kaseya.

Other exploited CVEs in Virtual System/Server Administrator (VSA)

• CVE-2017-18362: Kaseya VSA SQL Injection Vulnerability (24 May 2022)
• CVE-2021-30116: Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability (3 Nov 2021)

References

• nvd.nist.gov/vuln/detail/CVE-2018-20753

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in April 2022 · Kaseya scorecard · act-now radar.