CVE-2023-20540
ASP HMAC Brute-Force Information Disclosure
Description
An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authentication code, allowing arbitrary message input, potentially leading to a loss of data integrity.
INFO
Published Date :
June 26, 2026, 3:44 p.m.
Last Modified :
June 26, 2026, 3:44 p.m.
Remotely Exploit :
No
Source :
AMD
Affected Products
The following products are affected by CVE-2023-20540
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | b58fc414-a1e4-4f92-9d70-1add41838648 | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Implement constant-time cryptographic operations.
- Validate message authentication codes securely.
- Harden the ASP against timing attacks.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-20540 vulnerability anywhere in the article.