CVE-2023-40709 Uncontrolled Resource Consumption in OPTO 22 SNAP PAC S1 Built-In Web Server
An attacker can crash the OPTO 22 SNAP PAC S1 device by flooding it with ICMP requests when the built-in web server is enabled but not fully configured.
- 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-2023-40709?
CVE-2023-40709 is a medium-severity denial of service 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
An adversary could crash the entire device by sending a large quantity of ICMP requests if the controller has the built-in web server enabled but does not have the built-in web server completely set up and configured for the SNAP PAC S1 Firmware version R10.3b
Which versions are affected by CVE-2023-40709?
It affects 1 product.
Products include Opto22 Snap Pac S1 Firmware.
How do I fix CVE-2023-40709?
No fix has been published for CVE-2023-40709 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-40709 being exploited?
There is no known exploitation of CVE-2023-40709 in the wild and no public exploit code.
Other vulnerabilities in OPTO 22 SNAP PAC S1
- CVE-2023-40706 Improper Restriction of Excessive Authentication Attempts in OPTO 22 SNAP PAC S1 Built-in Web Server
- CVE-2023-40707 Weak password requirements in OPTO 22 SNAP PAC S1 Built-in Web Server
- CVE-2023-40710 Denial of service in SNAP PAC S1
- CVE-2023-40708 Improper Access Control in OPTO 22 SNAP PAC S1
Sources
Also known as GHSA-8frv-2qrv-c3x2.