> USN-7825-1: MuPDF vulnerabilities

It was discovered that MuPDF incorrectly managed memory, resulting in a memory leak. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-1000036) It was discovered that MuPDF could enter an infinite loop when parsing certain PDF files. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-10289) It was discovered that MuPDF incorrectly managed memory, possibly leading to a segmentation fault. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-16647, CVE-2018-16648) It was discovered that MuPDF contained a use-after-free vulnerability. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-21896) It was discovered that MuPDF incorrectly managed memory, resulting in a memory leak. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-26683) Maxim Mishechkin, Vitalii Akolzin, Shamil Kurmangaleev, Denis Straghkov, Fedor Nis'kov and Ivan Gulakov discovered that MuPDF incorrectly managed memory under certain circumstances, leading to a double-free. An attacker could possibly use this to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-3407) Xuwei Liu discovered that MuPDF may perform an out-of-bounds write under certain circumstances. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-37220)