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cURL/libcURL 7.x < 7.39.0 'curl_easy_duphandle()' Out-of-Bounds Read Issue

Medium

Synopsis

The cURL program is a library and command-line tool for transferring data using various protocols, including HTTP, FTP, and LDAP. A vulnerable version of cURL was detected from the host.

Description

Versions of cURL/libcURL older than 7.39.0 are unpatched for an out-of-bounds read vulnerability in the 'curl_easy_duphandle()' function, which is triggered when using the CURLOPT_COPYPOSTFIELDS option and sending a binary HTTP POST. This can be leveraged to cause a crash or disclose heap memory contents.

Solution

Upgrade the affected packages; the next version of cURL/libcURL that fixes the issue is cURL 7.39.0.