VAR-201207-0138

Vulnerability from variot - Updated: 2023-12-18 13:20

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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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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