Vulnerability · Published May 12, 2021 · Assigned by siemens

CVE-2020-25242

High 7.5

In plain English

A high-severity uncontrolled resource consumption in SIMATIC NET CP 343-1 Advanced (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 1.3% (higher than 70% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)1.3%top 30.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A vulnerability has been identified in SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) (All versions). Specially crafted packets sent to TCP port 102 could cause a Denial-of-Service condition on the affected devices. A cold restart might be necessary in order to recover.

Affected products (as reported)

Vendor	Product	Versions
Siemens	SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants)	All versions
Siemens	SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants)	All versions
Siemens	SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants)	All versions

Weakness: CWE-400

References

https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf x_refsource_CONFIRM
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-07 x_refsource_MISC