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CVE-2023-0361

7.4 · HIGH

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS.

Published Feb 15, 2023CWE-203EPSS 1.45%

Overview

CVE-2023-0361 is a high-severity vulnerability. It was published on February 15, 2023 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.

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

Refaccess.redhat.com/security/cve/CVE-2023-0361GitHubgithub.com/tlsfuzzer/tlsfuzzer/pull/679Refgitlab.com/gnutls/gnutls/-/issues/1050Reflists.debian.org/debian-lts-announce/2023/02/msg00015.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFIA3X4IZ3CW7SRQ2UHNHNPMRIAWF2FI/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS4KVDOG6QTALWHC2QE4Y7VPDRMLTRWQ/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z634YBXAJ5VLDI62IOPBVP5K6YFHAWCY/Refsecurity.netapp.com/advisory/ntap-20230324-0005/Refsecurity.netapp.com/advisory/ntap-20230725-0005/Refaccess.redhat.com/security/cve/CVE-2023-0361

How CyberStrike helps

Frequently asked questions

What is CVE-2023-0361?

CVE-2023-0361 is a high-severity vulnerability. It was published on February 15, 2023 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2023-0361?

This vulnerability has a CVSS 3.1 base score of 7.4, 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-2023-0361?

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-2023-0361?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-0361 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.

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