USN-4446-1: Squid vulnerabilities

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Ubuntu security notices

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Jeriko One discovered that Squid incorrectly handled caching certain requests. A remote attacker could possibly use this issue to perform cache-injection attacks or gain access to reverse proxy features such as ESI. (CVE-2019-12520) Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly handled certain URN requests. A remote attacker could possibly use this issue to bypass access checks. (CVE-2019-12523) Jeriko One discovered that Squid incorrectly handled URL decoding. A remote attacker could possibly use this issue to bypass certain rule checks. (CVE-2019-12524) Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly handled input validation. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2019-18676)

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