(Semi-)Authenticated local file inclusion in Kaseya VSA < v9.5.6
CVE-2021-30121

6.5MEDIUM

Key Information:

Vendor

Kaseya

Status
Vsa
Vendor
CVE Published:
9 July 2021

What is CVE-2021-30121?

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

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References

https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/
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https://csirt.divd.nl/DIVD-2021-00011
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https://csirt.divd.nl/CVE-2021-30121
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CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Discovered by Wietse Boonstra of DIVD
Additional research by Frank Breedijk of DIVD
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