CVE-2021-42540 Emerson WirelessHART Gateway
A low-privileged user can exploit unsanitized folder extraction to overwrite system settings and key functionality in 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-2021-42540?
CVE-2021-42540 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 a unsanitized extract folder for system configuration. A low-privileged user can leverage this logic to overwrite the settings and other key functionality.
Weakness: CWE-123
Which versions are affected by CVE-2021-42540?
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-2021-42540?
No fix has been published for CVE-2021-42540 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-2021-42540 being exploited?
There is no known exploitation of CVE-2021-42540 in the wild and no public exploit code.
Other vulnerabilities in Emerson WirelessHART Gateway
Sources
Also known as GHSA-2gp7-jhh8-9gqw.