CVE-2021-30121 (Semi-)Authenticated local file inclusion in Kaseya VSA < v9.5.6
An attacker with a valid session can read arbitrary files from the server via local file inclusion in Kaseya VSA.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-30121?
CVE-2021-30121 is a medium-severity path traversal vulnerability in n/a, published on 9 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Semi-authenticated local file inclusion The contents of arbitrary files can be returned by the webserver Example request: `https://x.x.x.x/KLC/js/Kaseya.SB.JS/js.aspx?path=C:\Kaseya\WebPages\dl.asp` A valid sessionId is required but can be easily obtained via CVE-2021-30118
Weakness: CWE-829
Which versions are affected by CVE-2021-30121?
It affects 1 product.
Products include Kaseya Vsa.
How do I fix CVE-2021-30121?
No fix has been published for CVE-2021-30121 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-30121 being exploited?
There is no known exploitation of CVE-2021-30121 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2021-30120 2FA bypass in Kaseya VSA <= v9.5.6
- CVE-2021-30117 Authenticated SQL injection in Kaseya VSA < v9.5.6
- CVE-2021-30118 Unauthenticated Remote Code Execution in Kaseya VSA < v9.5.5
- CVE-2021-30201 Unauthenticated XML External Entity vulnerability in Kaseya VSA < v9.5.6
- CVE-2019-14510 Hardcoded credentials in n/a
Sources
Also known as GHSA-v66q-p7rm-w9w6.