Kaseya KServer prior 6.3.0.2 uploadImage.asp filename unrestricted upload

Summaryinfo

A vulnerability marked as critical has been reported in Kaseya KServer. Affected is an unknown function of the file uploadImage.asp. This manipulation of the argument filename causes unrestricted upload. This vulnerability is tracked as CVE-2013-10034. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Kaseya KServer. It has been declared as critical. Affected by this vulnerability is an unknown code of the file uploadImage.asp. The manipulation of the argument filename with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An unrestricted file upload vulnerability exists in Kaseya KServer versions prior to 6.3.0.2. The uploadImage.asp endpoint allows unauthenticated users to upload files to arbitrary paths via a crafted filename parameter in a multipart/form-data POST request. Due to the lack of authentication and input sanitation, an attacker can upload a file with an .asp extension to a web-accessible directory, which can then be invoked to execute arbitrary code with the privileges of the IUSR account. The vulnerability enables remote code execution without prior authentication and was resolved in version 6.3.0.2 by removing the vulnerable uploadImage.asp endpoint.

The weakness was disclosed by Thomas Hibbert. It is possible to read the advisory at raw.githubusercontent.com. This vulnerability is known as CVE-2013-10034 since 07/30/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. By approaching the search of inurl:uploadImage.asp it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 6.3.0.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (29675) and EUVD (EUVD-2013-7256). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Kaseya

Name

• KServer

License

• commercial

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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