{"id":"CVE-2018-4012","aliases":["EUVD-2018-15798","GHSA-vm7v-ghcw-jg4f"],"status":"published","title":"An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the...","description":"An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. An unauthenticated attacker could impersonate a remote BrightCloud server to trigger this vulnerability.","severity":{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-06","score":0.02546,"percentile":0.85083,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2019-01-03T22:29:00.417Z","modified":"2026-06-17T01:58:12Z","products":[{"vendor":"webroot","product":"brightcloud"}],"references":[{"url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0683","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-4012"},{"url":"https://github.com/advisories/GHSA-vm7v-ghcw-jg4f"}],"sources":{"cve":[{"id":"CVE-2018-4012","description":"An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. An unauthenticated attacker could impersonate a remote BrightCloud server to trigger this vulnerability.","status":"published","published":"2019-01-03T23:00:00Z","modified":"2024-08-05T04:57:24.532Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"updated_at":"2026-11-02T14:35:08.024147Z"}],"euvd":[{"id":"EUVD-2018-15798","description":"An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. An unauthenticated attacker could impersonate a remote BrightCloud server to trigger this vulnerability.","status":"published","published":"2019-01-03T23:00:00Z","modified":"2024-08-05T04:57:24Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T02:40:15.208866Z"}],"ghsa":[{"id":"GHSA-vm7v-ghcw-jg4f","title":"An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the...","description":"An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. An unauthenticated attacker could impersonate a remote BrightCloud server to trigger this vulnerability.","status":"published","published":"2022-05-13T01:01:45Z","modified":"2023-02-01T05:02:24Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:49:54.32219Z"}],"nvd":[{"id":"CVE-2018-4012","description":"An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. An unauthenticated attacker could impersonate a remote BrightCloud server to trigger this vulnerability.","status":"published","published":"2019-01-03T22:29:00.417Z","modified":"2026-06-17T01:58:12.97Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:04:52.056758Z"}]}}