Exploited vulnerability · CISA KEV

Is CVE-2021-30116 exploited? Yes: in CISA KEV since 3 Nov 2021

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

Yes. CVE-2021-30116, Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 117 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 Virtual System/Server Administrator (VSA) contains an information disclosure vulnerability allowing an attacker to obtain the sessionId that can be used to execute further attacks against the system.

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 9 Jul 2021.
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-2018-20753: Kaseya VSA Remote Code Execution Vulnerability (13 Apr 2022)

References

• nvd.nist.gov/vuln/detail/CVE-2021-30116

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 November 2021 · Kaseya scorecard · act-now radar.