CVE-2018-4843 describes a denial-of-service vulnerability affecting numerous Siemens SIMATIC S7-300, S7-400, S7-1500 CPUs, CPs, and other related industrial control systems. An unauthenticated attacker on the same Ethernet segment can send a specially crafted PROFINET DCP packet to trigger a DoS condition, requiring a manual restart for recovery. This vulnerability has a CVSS score of 6.5 (Medium) due to its network-adjacent attack vector and high availability impact. There is no evidence of active exploitation, public exploit code, or inclusion in CISA's KEV catalog, though it has received some community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:siemens:simatic_cp_343-1_firmware:-:*:*:*:advanced:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:siemens:simatic_cp_343-1_firmware:-:*:*:*:standard:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:siemens:simatic_cp_443-1_firmware:-:*:*:*:advanced:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:siemens:simatic_cp_443-1_firmware:-:*:*:*:standard:*:*:* | ||
< 1.7.0CPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-1500_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.