cookie injection for other servers

Open Source Vulnerabilities CVE-2016-8615

A flaw was found in curl before version 7.51. If cookie state is written into a cookie jar file that is later read back and used for subsequent requests, a malicious HTTP server can inject new cookies for arbitrary domains into said cookie jar.

Open Source Vulnerabilities CURL-CVE-2016-8615

If cookie state is written into a cookie jar file that is later read back and used for subsequent requests, a malicious HTTP server can inject new cookies for arbitrary domains into said cookie jar. The issue pertains to the function that loads cookies into memory, which reads the specified file into a fixed-size buffer in a line-by-line manner using the `fgets()` function. If an invocation of `fgets()` cannot read the whole line into the destination buffer due to it being too small, it truncates the output. This way, a long cookie (name + value) sent by a malicious server would be stored in the file and subsequently that cookie could be read partially and crafted correctly, it could be treated as a different cookie for another server.