USN-4487-2: libx11 vulnerabilities

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Ubuntu security notices

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USN-4487-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM. Original advisory details: Todd Carson discovered that libx11 incorrectly handled certain memory operations. A local attacker could possibly use this issue to escalate privileges. (CVE-2020-14344) Jayden Rivers discovered that libx11 incorrectly handled locales. A local attacker could possibly use this issue to escalate privileges. (CVE-2020-14363)

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