CVE-2021-31884 describes a critical vulnerability in numerous Siemens APOGEE, Desigo, and TALON building automation systems, as well as products utilizing Nucleus NET and Nucleus ReadyStart V3. The flaw stems from the DHCP client's assumption of NULL-terminated data in the "Hostname" DHCP option, potentially leading to out-of-bounds reads, writes, and denial-of-service conditions. With a CVSS score of 9.8 (CRITICAL), this vulnerability is remotely exploitable with low attack complexity and no user interaction, allowing for high impact on confidentiality, integrity, and availability. Currently, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:capital_vstar:-:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* | ||
< 2017.02.1CPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:o:siemens:apogee_modular_building_controller_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.