Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2023-45287

7.5 · HIGH

Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time.

Published Dec 5, 2023CWE-203EPSS 1.25%

Overview

CVE-2023-45287 is a high-severity vulnerability. It was published on December 5, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgo.dev/cl/326012/26Refgo.dev/issue/20654Refgroups.google.com/g/golang-announce/c/QMK8IQALDvARefpeople.redhat.com/~hkario/marvin/Refpkg.go.dev/vuln/GO-2023-2375Refsecurity.netapp.com/advisory/ntap-20240112-0005/Refgo.dev/cl/326012/26Refgo.dev/issue/20654Refgroups.google.com/g/golang-announce/c/QMK8IQALDvARefpeople.redhat.com/~hkario/marvin/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-45287?

CVE-2023-45287 is a high-severity vulnerability. It was published on December 5, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-45287?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-45287?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-45287?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-45287 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2023

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999