HIGH 7.5 Microsoft

CVE-2023-28319

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.

Microsoft Security Update 2023-May: 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

References

Published: 2023-05-09 · Source: Microsoft · Feed updated: 2026-09-03
This high severity vulnerability with a CVSS score of 7.5 was published on 2023-05-09 via Microsoft. Affected: cbl2 rust 1.72.0-2 on CBL Mariner 2.0, cbl2 mysql 8.0.34-1 on CBL Mariner 2.0, cbl2 curl 8.2.1-1 on CBL Mariner 2.0 and 2 more.
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