{"id":"CVE-2018-19974","aliases":["DEBIAN-CVE-2018-19974","EUVD-2018-11641","GHSA-qgr5-73wm-7w3g","UBUNTU-CVE-2018-19974"],"status":"published","title":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM...","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","severity":{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01265,"percentile":0.69901,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-908"],"published":"2018-12-17T18:00:00Z","modified":"2026-10-23T18:03:47Z","fixes":[{"ecosystem":"Debian:12","package":"yara","fixed_in":["3.8.1-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"yara","fixed_in":["3.8.1-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"yara","fixed_in":["3.8.1-2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"yara","fixed_in":["3.4.0+dfsg-2ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"yara","fixed_in":["3.7.1-1ubuntu2+esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"yara","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.1-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"yara","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.1-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"yara","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.1-2"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"yara","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.0+dfsg-2ubuntu0.1~esm1"}]}],"versions":["3.4.0+dfsg-2","3.4.0+dfsg-2build1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"yara","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.1-1ubuntu2+esm1"}]}],"versions":["3.6.3+dfsg-1ubuntu1","3.7.1-1ubuntu1","3.7.1-1ubuntu2"]}],"products":[{"vendor":"virustotal","product":"yara"}],"references":[{"url":"https://bnbdr.github.io/posts/extracheese/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://github.com/VirusTotal/yara/issues/999","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/bnbdr/swisscheese/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-19974"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/"},{"url":"https://github.com/advisories/GHSA-qgr5-73wm-7w3g"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-19974","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-19974","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-19974","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8080-1","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2018-19974","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","status":"published","published":"2018-12-17T18:00:00Z","modified":"2024-08-05T11:51:17.913Z","updated_at":"2026-11-02T14:35:03.288698Z"}],"euvd":[{"id":"EUVD-2018-11641","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","status":"published","published":"2018-12-17T18:00:00Z","modified":"2024-08-05T11:51:17Z","updated_at":"2026-11-03T02:39:31.9745Z"}],"ghsa":[{"id":"GHSA-qgr5-73wm-7w3g","title":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM...","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","status":"published","published":"2022-05-13T01:19:50Z","modified":"2023-02-01T05:05:54Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-908"],"updated_at":"2026-11-02T14:50:17.420383Z"}],"nvd":[{"id":"CVE-2018-19974","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","status":"published","published":"2018-12-17T19:29:01.08Z","modified":"2026-06-17T01:50:13.08Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-908"],"updated_at":"2026-11-02T14:04:50.99633Z"}],"osv":[{"id":"CVE-2018-19974","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","status":"published","published":"2018-12-17T19:29:01.08Z","modified":"2026-10-20T10:50:05.436980403Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:09.145458Z"},{"id":"DEBIAN-CVE-2018-19974","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","status":"published","published":"2018-12-17T19:29:01.08Z","modified":"2026-10-23T18:03:47.777988837Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:30.57382Z"},{"id":"UBUNTU-CVE-2018-19974","description":"In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).","status":"published","published":"2018-12-17T19:29:00Z","modified":"2026-04-22T11:51:50.421683Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:17.91743Z"}]}}