🛡️ CVE-2023-45287
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-203 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-203
Public Exploit ✅ No
Source NVD
Published 2023-12-05
Updated 2026-06-08
Modified 2024-11-21
Fix URL N/A

Affected Packages

Software From version Fixed in
go — 1.20.0
golang — —
stdlib — —

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