Home/CVE/Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability
CVE

CVE-2016-8562

Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability

A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.

HIGH · CVSS 7.5 ⚠ CISA KEV EPSS 0.18545
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

▤

Affected Products & Versions

2
siemens simatic cp 1543-1 firmware< 2.0.28
siemens siplus net cp 1543-1 firmware< 2.0.28
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD18 Nov 2016 · 09:59 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
cisaKEV-CVE-2016-8562
siemens-csafSSA-672373
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/94436Broken LinkThird Party AdvisoryVDB Entry
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdfBroken LinkPatchVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdfVendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01Third Party AdvisoryUS Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-8562US Government Resource
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