CVE-2017-9502

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CVE-2017-9502

Summary:

Details: In curl before 7.54.1 on Windows and DOS, libcurl's default protocol function, which is the logic that allows an application to set which protocol libcurl should attempt to use when given a URL without a scheme part, had a flaw that could lead to it overwriting a heap based memory buffer with seven bytes. If the default protocol is specified to be FILE or a file: URL lacks two slashes, the given "URL" starts with a drive letter, and libcurl is built for Windows or DOS, then libcurl would copy the path 7 bytes off, so that the end of the given path would write beyond the malloc buffer (7 bytes being the length in bytes of the ascii string "file://").

References: http://www.securitytracker.com/id/1038697, http://openwall.com/lists/oss-security/2017/06/14/1, http://www.securityfocus.com/bid/99120, https://curl.haxx.se/docs/adv_20170614.html