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CVE-2023-28319

7.5 · HIGH

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash.

Published May 26, 2023CWE-416EPSS 2.49%

Overview

CVE-2023-28319 is a high-severity vulnerability. It was published on May 26, 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

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the fingerprint before it returns an error message containing the (now freed) hash. This flaw risks inserting sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and revealed.

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

Refseclists.org/fulldisclosure/2023/Jul/47Refseclists.org/fulldisclosure/2023/Jul/48Refseclists.org/fulldisclosure/2023/Jul/52Refhackerone.com/reports/1913733Refsecurity.gentoo.org/glsa/202310-12Refsecurity.netapp.com/advisory/ntap-20230609-0009/Refsupport.apple.com/kb/HT213843Refsupport.apple.com/kb/HT213844Refsupport.apple.com/kb/HT213845Refseclists.org/fulldisclosure/2023/Jul/47

How CyberStrike helps

Frequently asked questions

What is CVE-2023-28319?

CVE-2023-28319 is a high-severity vulnerability. It was published on May 26, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-28319?

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-2023-28319?

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-2023-28319?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-28319 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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