Joshua Rogers discovered that Squid incorrectly handled requests with the urn: scheme. A remote attacker could possibly use this issue to cause Squid to consume resources, leading to a denial of service. (CVE-2021-28651) Joshua Rogers discovered that Squid incorrectly handled requests to the Cache Manager API. A remote attacker with access privileges could possibly use this issue to cause Squid to consume resources, leading to a denial of service. This issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-28652) Joshua Rogers discovered that Squid incorrectly handled certain response headers. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue was only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-28662) Joshua Rogers discovered that Squid incorrectly handled range request processing. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2021-31806, CVE-2021-31807, CVE-2021-31808) Joshua Rogers discovered that Squid incorrectly handled certain HTTP responses. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2021-33620)
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