var-201207-0138
Vulnerability from variot
Siemens SIMATIC S7-400 PN CPU devices with firmware 5.x allow remote attackers to cause a denial of service (defect-mode transition and service outage) via (1) malformed HTTP traffic or (2) malformed IP packets. Siemens SIMATIC is an automation software in a single engineering environment. There is a security hole in SIEMENS SIMATIC S7-400. Since the Ethernet port on the SIMATIC S7-400 V5 receives a malformed IP or HTTP message, the device enters the Defect mode. The SIMATIC S7-400 V5 CPU defect mode locks the unit, so process control processing cannot be performed and the attacker can use it. This vulnerability is a denial of service attack. SIEMENS SIMATIC S7-400 is prone to multiple denial-of-service vulnerabilities. Remote attackers may exploit this issue to cause denial-of-service conditions, denying service to legitimate users. Vulnerabilities exist in Siemens SIMATIC S7-400 PN CPU firmware device version 5.x
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.