CVE-2021-42542 Emerson WirelessHART Gateway

High 8.0 Published 22 Oct 2021 Updated 16 Sep 2024

Attackers can exploit directory traversal in the backup folder structure to read or modify files on the Emerson WirelessHART Gateway.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-42542?

CVE-2021-42542 is a high-severity path traversal vulnerability in Emerson WirelessHART Gateway, published on 22 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

The affected product is vulnerable to directory traversal due to mishandling of provided backup folder structure.

Weakness: CWE-22

Which versions are affected by CVE-2021-42542?

It affects 3 products.

Products include Emerson Wireless 1410 Gateway Firmware, Emerson Wireless 1410d Gateway Firmware, Emerson Wireless 1420 Gateway Firmware.

How do I fix CVE-2021-42542?

No fix has been published for CVE-2021-42542 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2021-42542 being exploited?

There is no known exploitation of CVE-2021-42542 in the wild and no public exploit code.

Sources

Also known as GHSA-rmf5-vmvg-379x.