CVE-2023-28319

Name of the Vulnerable Software and Affected Versions curl versions prior to 8.1.0

Description A use after free issue exists in the way libcurl verifies an SSH server's public key using a SHA 256 hash. When this check fails, libcurl frees the memory for the fingerprint before returning 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.

Recommendations For versions prior to 8.1.0, update to version 8.1.0 or later to resolve the issue. As a temporary workaround, consider disabling the SSH server's public key verification feature using a SHA 256 hash until a patch is available. Restrict access to sensitive information that may be leaked due to this flaw to minimize the risk of exploitation.