CVE-2018-4850
A vulnerability has been identified in SIMATIC S7-400 (incl.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.51% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- siemens/simatic s7-400 firmware · siemens/simatic s7-400h firmware
- Source
- productcert@siemens.com
References
- http://www.securityfocus.com/bid/104217Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdfVendor Advisory
- https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublicationsVendor Advisory
- http://www.securityfocus.com/bid/104217Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdfVendor Advisory
- https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublicationsVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.