{"id":"CVE-2020-28194","details":"Variable underflow exists in accel-ppp radius/packet.c when receiving a RADIUS vendor-specific attribute with length field is less than 2. It has an impact only when the attacker controls the RADIUS server, which can lead to arbitrary code execution.","modified":"2026-04-11T17:54:07.871130Z","published":"2021-02-01T14:15:12.240Z","related":["GHSA-2m44-rh3c-x4gr"],"references":[{"type":"FIX","url":"https://github.com/accel-ppp/accel-ppp/commit/e9d369aa0054312b7633e964e9f7eb323f1f3d69"},{"type":"FIX","url":"https://github.com/accel-ppp/accel-ppp/security/advisories/GHSA-2m44-rh3c-x4gr"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/accel-ppp/accel-ppp","events":[{"introduced":"0"},{"fixed":"e9d369aa0054312b7633e964e9f7eb323f1f3d69"}]},{"type":"GIT","repo":"https://github.com/accel-ppp/accel-ppp","events":[{"introduced":"0"},{"fixed":"e9d369aa0054312b7633e964e9f7eb323f1f3d69"}]}],"versions":["1.10.0","1.12.0"],"database_specific":{"vanir_signatures":[{"signature_type":"Function","source":"https://github.com/accel-ppp/accel-ppp/commit/e9d369aa0054312b7633e964e9f7eb323f1f3d69","id":"CVE-2020-28194-28ac3858","deprecated":false,"target":{"file":"accel-pppd/radius/packet.c","function":"rad_packet_recv"},"digest":{"function_hash":"218305480135744760965322474118285676607","length":3593},"signature_version":"v1"},{"signature_type":"Line","source":"https://github.com/accel-ppp/accel-ppp/commit/e9d369aa0054312b7633e964e9f7eb323f1f3d69","id":"CVE-2020-28194-2fff89dc","deprecated":false,"target":{"file":"accel-pppd/radius/packet.c"},"digest":{"line_hashes":["53169831652962479236524189091079696734","193894202797788791053606579230416303418","56156999255468833464194175077938322916","108214281405374322627184477935854642973"],"threshold":0.9},"signature_version":"v1"}],"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"1.12.0-e9d369a"}]}],"vanir_signatures_modified":"2026-04-11T17:54:07Z","source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28194.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}