{"id":"USN-7239-1","summary":"libmicrodns vulnerabilities","details":"It was discovered that libmicrodns could recursively follow the same\ncompression pointer, leading to an infinite loop. An attacker could\npossibly use this issue to cause a denial of service. (CVE-2020-6071)\n\nIt was discovered that libmicrodns did not check the return value of the\nrr_decode function, which could lead to a double free. An attacker could\npossibly use this issue to execute arbitrary code. (CVE-2020-6072)\n\nIt was discovered that libmicrodns incorrectly handled certain inputs,\nwhich could lead to an integer overflow. An attacker could possibly use\nthis issue to cause a denial of service. (CVE-2020-6073)\n\nIt was discovered that libmicrodns incorrectly handled certain inputs,\nwhich could lead to a out-of-bounds read. An attacker could possibly use\nthis issue to cause a denial of service. (CVE-2020-6077)\n\nIt was discovered that libmicrodns incorrectly handled memory when parsing\nmDNS messages in mdns_recv, which could lead to a NULL pointer dereference.\nAn attacker could possibly use this issue to cause a denial of service.\n(CVE-2020-6078)\n\nIt was discovered that libmicrodns incorrectly handled memory, which could\nlead to excessive memory consumption due to memory leaks. An attacker\ncould possibly use this issue to cause a denial of service.\n(CVE-2020-6079, CVE-2020-6080)\n","modified":"2026-02-10T04:46:29Z","published":"2025-01-28T23:36:20Z","related":["UBUNTU-CVE-2020-6071","UBUNTU-CVE-2020-6072","UBUNTU-CVE-2020-6073","UBUNTU-CVE-2020-6077","UBUNTU-CVE-2020-6078","UBUNTU-CVE-2020-6079","UBUNTU-CVE-2020-6080"],"upstream":["CVE-2020-6071","CVE-2020-6072","CVE-2020-6073","CVE-2020-6077","CVE-2020-6078","CVE-2020-6079","CVE-2020-6080","UBUNTU-CVE-2020-6071","UBUNTU-CVE-2020-6072","UBUNTU-CVE-2020-6073","UBUNTU-CVE-2020-6077","UBUNTU-CVE-2020-6078","UBUNTU-CVE-2020-6079","UBUNTU-CVE-2020-6080"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7239-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6071"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6072"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6073"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6077"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6078"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6079"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-6080"}],"affected":[{"package":{"name":"libmicrodns","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libmicrodns@0.0.8-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.8-1ubuntu0.1~esm1"}]}],"versions":["0.0.7-2","0.0.8-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.0.8-1ubuntu0.1~esm1","binary_name":"libmicrodns-dev"},{"binary_version":"0.0.8-1ubuntu0.1~esm1","binary_name":"libmicrodns0"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7239-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-6071"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-6072"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-6073"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-6077"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-6078"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-6079"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-6080"}],"ecosystem":"Ubuntu:Pro:18.04:LTS"}}}],"schema_version":"1.7.3"}