Vulnerability · Published Sep 10, 2024 · Assigned by siemens
CVE-2023-30756
Medium 5.9
In plain English
A medium-severity null pointer dereference in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) | 0 – before V3.5.20 |
| Siemens | SIMATIC CP 1243-1 (incl. SIPLUS variants) | 0 – before V3.5.20 |
| Siemens | SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) | 0 – before V3.5.20 |
| Siemens | SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) | 0 – before V3.5.20 |
| Siemens | SIMATIC CP 1243-7 LTE | 0 – before V3.5.20 |
| Siemens | SIMATIC CP 1243-8 IRC | 0 – before V3.5.20 |
| Siemens | SIMATIC HMI Comfort Panels (incl. SIPLUS variants) | All versions |
| Siemens | SIMATIC IPC DiagBase | 0 – before * |
| Siemens | SIMATIC IPC DiagMonitor | All versions |
| Siemens | SIMATIC WinCC Runtime Advanced | All versions |
| Siemens | SIPLUS TIM 1531 IRC | 0 – before V2.4.8 |
| Siemens | TIM 1531 IRC | 0 – before V2.4.8 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C