JumpCloud Remote Assist < 0.317.0 Arbitrary File Write/Delete via Insecure Temp Directory

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.

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创建拥有不安全权限的临时文件

JumpCloud Remote Assist 安全漏洞

JumpCloud Remote Assist是美国JumpCloud公司的一个远程访问模块。 JumpCloud Remote Assist 0.317.0之前版本存在安全漏洞，该漏洞源于卸载程序执行特权操作时未验证目录信任，可能导致任意文件写入或删除和本地权限提升。

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