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Security Bugs Patched in Kaseya VSA Management System

Cloud-based IT management and security solutions provider Kaseya has released software updates to address several vulnerabilities identified by a researcher in the company’s Virtual System Administrator (VSA) IT management system.

Kaseya VSA, which according to the vendor is used in thousands of organizations, allows the integration of all IT functions into a single console.

Earlier this year, Pedro Ribeiro of Agile Information Security uncovered a path traversal and two open redirect vulnerabilities in Kaseya’s VSA product.

According to an advisory published by CERT/CC on Monday, the path traversal bug (CVE-2015-2862) is caused by the improper limitation of a pathname to a restricted directory. The weakness allows an authenticated attacker to traverse directories and download arbitrary files by sending a crafted HTTP request to the server hosting the vulnerable software.

“A valid login is needed, and the Referrer header must be included. A sample request can be obtained by downloading any file attached to any ticket, and then modifying it with the appropriate path traversal,” Ribeiro wrote in his own advisory.

The open redirect vulnerabilities (CVE-2015-2863) can be exploited to redirect users to arbitrary domains by tricking them into clicking on a legitimate-looking link.

The arbitrary file download vulnerability affects VSA R9 and possibly other versions. The open redirect bugs plague versions R7.x, R8.x and R9.x.

Kaseya has released versions 9.1.0.4, 9.0.0.14. 8.0.0.18 and 7.0.0.29 to address the vulnerabilities.

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Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.