Ubuntu Security Update USN-4607-1: OpenJDK vulnerabilities

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It was discovered that OpenJDK incorrectly handled deserializing Proxy class objects with many interfaces. A remote attacker could possibly use this issue to cause a denial of service (memory consumption) via a specially crafted input. (CVE-2020-14779) Sergey Ostanin discovered that OpenJDK incorrectly restricted authentication mechanisms. A remote attacker could possibly use this issue to obtain sensitive information over an unencrypted connection. (CVE-2020-14781) It was discovered that OpenJDK incorrectly handled untrusted certificates. An attacker could possibly use this issue to read or write sensitive information. (CVE-2020-14782) Zhiqiang Zang discovered that OpenJDK incorrectly checked for integer overflows. An attacker could possibly use this issue to bypass certain Java sandbox restrictions. (CVE-2020-14792) Markus Loewe discovered that OpenJDK incorrectly checked permissions when converting a file system path to an URI. An attacker could possibly use this issue to bypass certain Java sandbox restrictions. (CVE-2020-14796) Markus Loewe discovered that OpenJDK incorrectly checked for invalid characters when converting an URI to a path. An attacker could possibly use this issue to read or write sensitive information. (CVE-2020-14797) Markus Loewe discovered that OpenJDK incorrectly checked the length of input strings. An attacker could possibly use this issue to bypass certain Java sandbox restrictions. (CVE-2020-14798) It was discovered that OpenJDK incorrectly handled boundary checks. An attacker could possibly use this issue to bypass certain Java sandbox restrictions. (CVE-2020-14803)

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