{"id":"CVE-2020-18778","aliases":["EUVD-2020-10692","GHSA-gm8p-5337-8j5p","UBUNTU-CVE-2020-18778"],"status":"published","title":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c...","description":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00886,"percentile":0.59538,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125","CWE-787"],"published":"2021-08-23T21:50:04Z","modified":"2026-10-24T10:30:59Z","affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"libav","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6:0.8.7-1ubuntu2","6:9.10-1ubuntu1","6:9.10-1ubuntu2","6:9.10-1ubuntu5","6:9.10-1ubuntu6","6:9.10-1ubuntu7","6:9.11-2ubuntu1","6:9.11-2ubuntu2","6:9.13-0ubuntu0.14.04.1","6:9.14-0ubuntu0.14.04.1","6:9.16-0ubuntu0.14.04.1","6:9.18-0ubuntu0.14.04.1","6:9.20-0ubuntu0.14.04.1","6:9.20-0ubuntu0.14.04.1+esm1"]}],"products":[{"vendor":"libav","product":"libav"}],"references":[{"url":"https://bugzilla.libav.org/show_bug.cgi?id=1155","tags":["x_refsource_MISC","x_transferred","Broken Link","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://cwe.mitre.org/data/definitions/126.html","tags":["x_refsource_MISC","x_transferred","Technical Description","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-18778"},{"url":"https://github.com/advisories/GHSA-gm8p-5337-8j5p"},{"url":"https://ubuntu.com/security/CVE-2020-18778","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-18778","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-18778","description":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.","status":"published","published":"2021-08-23T21:50:04Z","modified":"2024-08-04T14:08:30.426Z","updated_at":"2026-11-02T14:35:59.434367Z"}],"euvd":[{"id":"EUVD-2020-10692","description":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.","status":"published","published":"2021-08-23T21:50:04Z","modified":"2024-08-04T14:08:30Z","updated_at":"2026-11-03T03:07:25.877716Z"}],"ghsa":[{"id":"GHSA-gm8p-5337-8j5p","title":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c...","description":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.","status":"published","published":"2022-05-24T19:12:06Z","modified":"2023-01-27T05:03:40Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125","CWE-787"],"updated_at":"2026-11-02T14:42:17.713098Z"}],"nvd":[{"id":"CVE-2020-18778","description":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.","status":"published","published":"2021-08-23T22:15:28.487Z","modified":"2026-06-17T02:59:28.967Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:06:45.704484Z"}],"osv":[{"id":"CVE-2020-18778","description":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.","status":"published","published":"2021-08-23T22:15:28.487Z","modified":"2026-10-24T10:30:59.28434548Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:15.212689Z"},{"id":"UBUNTU-CVE-2020-18778","description":"In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.","status":"published","published":"2021-08-23T22:15:00Z","modified":"2026-04-22T12:32:10.563093Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:23.344108Z"}]}}