CVE-2023-40706 Improper Restriction of Excessive Authentication Attempts in OPTO 22 SNAP PAC S1 Built-in Web Server

High 8.6 Published 24 Aug 2023 Updated 2 Oct 2024

Attackers can brute-force login credentials on the SNAP PAC S1 web server due to missing rate limiting, potentially gaining unauthorized access.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-40706?

CVE-2023-40706 is a high-severity authentication bypass vulnerability in OPTO 22 SNAP PAC S1, published on 24 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

There is no limit on the number of login attempts in the web server for the SNAP PAC S1 Firmware version R10.3b. This could allow for a brute-force attack on the built-in web server login.

Weakness: CWE-307

Which versions are affected by CVE-2023-40706?

It affects 1 product.

Products include Opto22 Snap Pac S1 Firmware.

How do I fix CVE-2023-40706?

No fix has been published for CVE-2023-40706 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2023-40706 being exploited?

There is no known exploitation of CVE-2023-40706 in the wild and no public exploit code.

Sources

Also known as GHSA-245g-9f78-5jxc.