What’s Vulnerable › Vulnerabilities

CVE-2023-28319

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-05-26 · updated 2026-10-23
• Weakness: CWE-416

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.

Affected products

• Apple macOS: from 11.0 before 11.7.9; from 12.0 before 12.6.8; from 13.0 before 13.5 — fixed in 11.7.9, 12.6.8, 13.5
• curl: before 8.1.0 — fixed in 8.1.0
• Clustered Data ONTAP: all versions
• NetApp H300S Firmware: all versions
• NetApp H410S Firmware: all versions
• NetApp H500S Firmware: all versions
• NetApp H700S Firmware: all versions
• NetApp Ontap Antivirus Connector: all versions

How to fix

Upgrade to a fixed version: Apple macOS 11.7.9, 12.6.8, 13.5; curl 8.1.0. Check the vendor advisory for mitigations.

References

• http://seclists.org/fulldisclosure/2023/Jul/47
• http://seclists.org/fulldisclosure/2023/Jul/48
• http://seclists.org/fulldisclosure/2023/Jul/52
• https://hackerone.com/reports/1913733
• https://security.gentoo.org/glsa/202310-12
• https://security.netapp.com/advisory/ntap-20230609-0009/
• https://support.apple.com/kb/HT213843
• https://support.apple.com/kb/HT213844
• https://support.apple.com/kb/HT213845
• http://seclists.org/fulldisclosure/2023/Jul/47
• http://seclists.org/fulldisclosure/2023/Jul/48
• http://seclists.org/fulldisclosure/2023/Jul/52

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