CVE-2023-40271 is a high-severity vulnerability affecting Trusted Firmware-M (TF-M) versions up to 1.8.0, specifically when using the CryptoCell PSA Driver with the Chacha20-Poly1305 authenticated encryption algorithm. The flaw lies in an incomplete authentication tag verification, where only the first 4 bytes are checked instead of the full 16, potentially allowing unauthenticated payloads to be accepted as legitimate. With a CVSS score of 7.5 (High), this vulnerability has a low attack complexity and could lead to high integrity impact, as it allows for the bypass of authentication mechanisms. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.6.0CPE matchmatch criteria | cpe:2.3:o:trustedfirmware:trusted_firmware-m:1.6.0:*:*:*:*:*:*:* | ||
1.6.1CPE matchmatch criteria | cpe:2.3:o:trustedfirmware:trusted_firmware-m:1.6.1:*:*:*:*:*:*:* | ||
1.7.0CPE matchmatch criteria | cpe:2.3:o:trustedfirmware:trusted_firmware-m:1.7.0:*:*:*:*:*:*:* | ||
1.8.0CPE matchmatch criteria | cpe:2.3:o:trustedfirmware:trusted_firmware-m:1.8.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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.
No media coverage found for this CVE.
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.