CVE-2017-7471 Path traversal in n/a

Critical 9.0 Published 9 Jul 2018 Updated 5 Aug 2024

A privileged guest user can escape the shared folder to access the host file system and escalate privileges on the host.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2017-7471?

CVE-2017-7471 is a critical path traversal vulnerability in Qemu Qemu, published on 9 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

Weakness: CWE-732

Which versions are affected by CVE-2017-7471?

It affects 1 product.

Products include Qemu Qemu.

How do I fix CVE-2017-7471?

Apply the vendor's patch.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2017-7471 being exploited?

There is no known exploitation of CVE-2017-7471 in the wild and no public exploit code.

All Qemu Qemu vulnerabilities

Sources

Also known as DEBIAN-CVE-2017-7471, GHSA-cjfg-wq59-q7v2.