CVE-2020-27009 is a critical vulnerability affecting Siemens APOGEE PXC and TALON TC controllers, as well as Siemens Nucleus NET and Nucleus Source Code, stemming from improper validation of DNS pointer offset values during record decompression. This flaw, part of the "NAME:WRECK" DNS vulnerabilities, allows a remote attacker with a privileged network position to execute arbitrary code or cause a denial-of-service by sending specially crafted DNS responses. Rated with a CVSS score of 8.1 (High), it has a high attack complexity but requires no user interaction. While there is no public exploit code available (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating awareness and potential for future exploitation, though it is not currently listed in CISA's KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.2CPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/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, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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.