{"id":"MGASA-2021-0307","summary":"Updated dhcp packages fix a security vulnerability","details":"A flaw was found in the Dynamic Host Configuration Protocol (DHCP). There is a\ndiscrepancy between the code that handles encapsulated option information \ninleases transmitted \"on the wire\" and the code which reads and parses lease\ninformation after it has been written to disk storage. This flaw allows an\nattacker to deliberately cause a situation where dhcpd while running in DHCPv4\nor DHCPv6 mode, or the dhclient attempts to read a stored lease that contains\noption information, to trigger a stack-based buffer overflow in the option\nparsing code for colon-separated hex digits values. The highest threat from\nthis vulnerability is to data confidentiality and integrity as well as service\navailability (CVE-2021-25217).\n","modified":"2026-04-16T04:41:25.474010112Z","published":"2021-06-30T23:58:41Z","upstream":["CVE-2021-25217"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2021-0307.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=28976"},{"type":"WEB","url":"https://kb.isc.org/docs/cve-2021-25217"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/Z2LB42JWIV4M4WDNXX5VGIP26FEYWKIF/"}],"affected":[{"package":{"name":"dhcp","ecosystem":"Mageia:7","purl":"pkg:rpm/mageia/dhcp?arch=source&distro=mageia-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.1-3.1.mga7"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2021-0307.json"}},{"package":{"name":"dhcp","ecosystem":"Mageia:8","purl":"pkg:rpm/mageia/dhcp?arch=source&distro=mageia-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.2-10.1.mga8"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2021-0307.json"}}],"schema_version":"1.7.5","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}