CVE-2021-43398 describes a timing leakage vulnerability in Crypto++ (aka Cryptopp) versions 8.6.0 and earlier, specifically within the MakePublicKey() function. This flaw allows an attacker to infer the private key length by observing execution times, potentially enabling timing attacks. The vulnerability is rated Medium severity (CVSS 5.3), indicating a low-complexity network attack that could lead to limited confidentiality impact. Despite the vendor disputing its practical exploitability due to intentional design choices, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 8.6.0CPE matchmatch criteria | cpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.