CVE-2023-51440 Denial of service in SIMATIC CP 343-1
Unauthenticated remote attackers can cause denial of service by injecting spoofed TCP RST packets due to improper TCP sequence number validation.
- 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-2023-51440?
CVE-2023-51440 is a high-severity denial of service vulnerability in Siemens SIMATIC CP 343-1, published on 13 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC CP 343-1 (6GK7343-1EX30-0XE0) (All versions), SIMATIC CP 343-1 Lean (6GK7343-1CX10-0XE0) (All versions), SIPLUS NET CP 343-1 (6AG1343-1EX30-7XE0) (All versions), SIPLUS NET CP 343-1 Lean (6AG1343-1CX10-2XE0) (All versions). Affected products incorrectly validate TCP sequence numbers. This could allow an unauthenticated remote attacker to create a denial of service condition by injecting spoofed TCP RST packets.
Weakness: CWE-940
Which versions are affected by CVE-2023-51440?
It affects 4 products.
Products include Siemens Simatic Cp 343-1 Firmware, Siemens Simatic Cp 343-1 Lean Firmware, Siemens Siplus Net Cp 343-1 Firmware, Siemens Siplus Net Cp 343-1 Lean Firmware.
How do I fix CVE-2023-51440?
No fix has been published for CVE-2023-51440 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-2023-51440 being exploited?
There is no known exploitation of CVE-2023-51440 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC CP 343-1
Sources
Also known as GHSA-j4h9-5vj5-4vff.