CVE-2023-30756 Null dereference in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants)
Remote attackers can cause denial of service in Siemens SIMATIC devices via a NULL dereference in the web server's Expect header handling.
- 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-2023-30756?
CVE-2023-30756 is a high-severity vulnerability in Siemens SIMATIC CP 1242-7 V2 (incl. SIPLUS variants), published on 10 Sep 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 1242-7 V2 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-7 LTE (All versions < V3.5.20), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.5.20), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions), SIMATIC IPC DiagBase (All versions), SIMATIC IPC DiagMonitor (All versions), SIMATIC WinCC Runtime Advanced (All versions), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.4.8). The web server of the affected devices do not properly handle certain errors when using the Expect HTTP request header, resulting in NULL dereference. This could allow a remote attacker with no privileges to cause a denial of service condition in the system.
Weakness: CWE-476
Which versions are affected by CVE-2023-30756?
How do I fix CVE-2023-30756?
No fix has been published for CVE-2023-30756 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-30756 being exploited?
There is no known exploitation of CVE-2023-30756 in the wild and no public exploit code.
Sources
Also known as GHSA-4p43-gfmp-qjmm.