JumpCloud Remote Assist up to 0.316.x on Windows DeleteFileW temp file

Summaryinfo

A vulnerability, which was classified as critical, has been found in JumpCloud Remote Assist up to 0.316.x on Windows. This affects the function DeleteFileW. This manipulation causes temp file. This vulnerability is handled as CVE-2025-34352. It is possible to launch the attack on the local host. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in JumpCloud Remote Assist up to 0.316.x on Windows and classified as critical. Affected by this vulnerability is the function DeleteFileW. The manipulation with an unknown input leads to a temp file vulnerability. The CWE definition for the vulnerability is CWE-378. Opening temporary files without appropriate measures or controls can leave the file, its contents and any function that it impacts vulnerable to attack. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

JumpCloud Remote Assist for Windows versions prior to 0.317.0 include an uninstaller that is invoked by the JumpCloud Windows Agent as NT AUTHORITY\SYSTEM during agent uninstall or update operations. The Remote Assist uninstaller performs privileged create, write, execute, and delete actions on predictable files inside a user-writable %TEMP% subdirectory without validating that the directory is trusted or resetting its ACLs when it already exists. A local, low-privileged attacker can pre-create the directory with weak permissions and leverage mount-point or symbolic-link redirection to (a) coerce arbitrary file writes to protected locations, leading to denial of service (e.g., by overwriting sensitive system files), or (b) win a race to redirect DeleteFileW() to attacker-chosen targets, enabling arbitrary file or folder deletion and local privilege escalation to SYSTEM. This issue is fixed in JumpCloud Remote Assist 0.317.0 and affects Windows systems where Remote Assist is installed and managed through the Agent lifecycle.

The weakness was released by Hillel Pinto. It is possible to read the advisory at jumpcloud.com. This vulnerability is known as CVE-2025-34352 since 04/15/2025. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.317.0 eliminates this vulnerability.

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Productinfo

Type

• Cloud Software

Vendor

• JumpCloud

Name

• Remote Assist

Version

• 0.316

CPE 2.3info

• 🔒

CPE 2.2info

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