{"id":"CVE-2020-8443","aliases":["EUVD-2020-29309","GHSA-wpvm-52j3-27mh"],"status":"published","title":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec...","description":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02685,"percentile":0.85945,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-193","CWE-787"],"published":"2020-01-30T00:34:28Z","modified":"2026-10-20T10:53:31Z","products":[{"vendor":"ossec","product":"ossec"}],"references":[{"url":"https://github.com/ossec/ossec-hids/issues/1821","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://www.ossec.net/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://github.com/ossec/ossec-hids/issues/1816","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://security.gentoo.org/glsa/202007-33","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8443"},{"url":"https://github.com/advisories/GHSA-wpvm-52j3-27mh"}],"sources":{"cve":[{"id":"CVE-2020-8443","description":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).","status":"published","published":"2020-01-30T00:34:28Z","modified":"2024-08-04T09:56:28.404Z","updated_at":"2026-11-02T14:35:50.88562Z"}],"euvd":[{"id":"EUVD-2020-29309","description":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).","status":"published","published":"2020-01-30T00:34:28Z","modified":"2024-08-04T09:56:28Z","updated_at":"2026-11-03T03:07:57.599144Z"}],"ghsa":[{"id":"GHSA-wpvm-52j3-27mh","title":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec...","description":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).","status":"published","published":"2022-05-24T17:07:44Z","modified":"2023-01-29T05:01:15Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:44:46.468507Z"}],"nvd":[{"id":"CVE-2020-8443","description":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).","status":"published","published":"2020-01-30T01:15:10.777Z","modified":"2026-06-17T03:26:23.51Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-193","CWE-787"],"updated_at":"2026-11-02T14:05:53.837808Z"}],"osv":[{"id":"CVE-2020-8443","description":"In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).","status":"published","published":"2020-01-30T01:15:10.777Z","modified":"2026-10-20T10:53:31.677848524Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:17.663289Z"}]}}