CVE catalog

CVE-2023-45287

golang-1.19: CVE-2023-45287

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: Dec 5, 2023, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.25% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	golang-1.19	bookworm	`1.19.8-2`	vulnerable
Ubuntu	golang-1.20	20.04	`1.20.3-1ubuntu0.1~20.04`	vulnerable
Ubuntu	golang-1.20	20.04	`1.20.3-1ubuntu0.1~20.04.1`	vulnerable
Ubuntu	golang-1.20	22.04	`1.20.3-1ubuntu0.1~22.04`	vulnerable
Ubuntu	golang-1.20	22.04	`1.20.3-1ubuntu0.1~22.04.1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	golang-1.19	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

Notes

[bookworm] golang-1.19: Minor issue; intrusive backport

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]