CVE-2021-31401 is a high-severity vulnerability affecting HCC embedded InterNiche 4.0.1 and various Siemens products utilizing the NicheStack TCP/IP stack. It stems from improper sanitization of the IP total length field, leading to an integer overflow when calculating IP data length with a crafted IP packet. This network-exploitable vulnerability requires no user interaction and can result in a complete loss of availability (CVSS 7.5, Attack Complexity Low). While not currently listed in CISA's KEV catalog or having public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.3CPE matchmatch criteria | cpe:2.3:a:hcc-embedded:nichestack:*:*:*:*:*:*:*:* | ||
< 1.2.0CPE matchmatch criteria | cpe:2.3:o:siemens:sentron_3wl_com35_firmware:*:*:*:*:*:*:*:* | ||
< 2.0.0CPE matchmatch criteria | cpe:2.3:o:siemens:sentron_3wa_com190_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/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, 0.1 Mastodon, and 0.4 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.