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.

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libcurl 资源管理错误漏洞

libcurl is a tool for transferring data from or to a server. A security vulnerability exists in libcurl that stems from the fact that libcurl provides the ability to validate the public key of an SSH server using a SHA 256 hash; when this check fails, libcurl releases the memory of the fingerprin...