{"id":"MGASA-2021-0301","summary":"Updated nginx package fixes a security vulnerability","details":"A flaw was found in nginx. An off-by-one error while processing DNS responses\nallows a network attacker to write a dot character out of bounds in a heap\nallocated buffer which can allow overwriting the least significant byte of next\nheap chunk metadata likely leading to a remote code execution in certain\ncircumstances. The highest threat from this vulnerability is to data\nconfidentiality and integrity as well as system availability (CVE-2021-23017).\n","modified":"2026-01-30T20:43:38.654188Z","published":"2021-06-29T17:31:40Z","related":["CVE-2021-23017"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2021-0301.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=28965"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2021/05/25/5"},{"type":"REPORT","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/"}],"affected":[{"package":{"name":"nginx","ecosystem":"Mageia:7","purl":"pkg:rpm/mageia/nginx?arch=source&distro=mageia-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.1-1.3.mga7"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2021-0301.json"}},{"package":{"name":"nginx","ecosystem":"Mageia:8","purl":"pkg:rpm/mageia/nginx?arch=source&distro=mageia-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-5.1.mga8"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2021-0301.json"}}],"schema_version":"1.7.3","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}