Ubuntu Security Notice USN-6500-2

Ubuntu Security Notice 6500-2 - USN-6500-1 fixed several vulnerabilities in Squid. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Joshua Rogers discovered that Squid incorrectly handled the Gopher protocol. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. Gopher support has been disabled in this update.

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