{"id":"CVE-2019-0211","kind":"vulnerability","aliases":["CVE-2019-0211"],"related":[],"title":"Apache HTTP Server: Apache HTTP Server Privilege Escalation Vulnerability","description":"In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute arbitrary code with the privileges of the parent process (usually root) by manipulating the scoreboard. Non-Unix systems are not affected.","summary":"Apache HTTP Server with the event, worker or prefork MPM lets code running in a less-privileged child process or thread (including scripts run by an in-process interpreter) manipulate the scoreboard to gain the privileges of the parent process, usually root. An attacker who already runs code inside a child worker can escalate to root on the server.","severity":"high","cvss":7.8,"epss":0.65005,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Apache HTTP Server","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apache-httpd","exploited","linux","runtime","self-hosted"],"not_affected_if":["managed-hosting","no-in-process-scripting"],"how_to_check":null,"fix":"Apply the Apache HTTP Server update per vendor instructions; the CISA entry gives no fixed version in the sources.","status":"open","published_at":"2019-04-08T22:29:00+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:43:31+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T21:43:31Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Apache HTTP Server update per vendor instructions; the CISA entry gives no fixed version in the sources.\nunknown","reach":"local","impact":"high","summary":"Apache HTTP Server with the event, worker or prefork MPM lets code running in a less-privileged child process or thread (including scripts run by an in-process interpreter) manipulate the scoreboard to gain the privileges of the parent process, usually root. An attacker who already runs code inside a child worker can escalate to root on the server.","category":"runtime","who_cares":["apache-httpd","self-hosted","linux"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker code in a worker escalates to root on the server.","analyst_note":"Find the fixed Apache httpd version and the affected version range from the Apache security advisory for CVE-2019-0211 and check how to detect the MPM and in-process interpreter setup.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting","no-in-process-scripting"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000488,"input_tokens":2870,"output_tokens":401,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the fixed Apache httpd version and the affected version range from the Apache security advisory for CVE-2019-0211 and check how to detect the MPM and in-process interpreter setup.","search":"'-0211':12A,15A '-2019':11A,14A '2.4':93C '2.4.17':95C '2.4.38':97C 'affect':147C 'alreadi':75B 'apach':1A,4A,20B,28B,90C 'apache':16A 'apache-httpd':19B 'arbitrari':126C 'attack':73B 'child':46B,80B,110C 'code':39B,77B,104C,127C 'could':124C 'cve':10A,13A 'escal':8A,83B 'event':33B,100C 'execut':105C,116C,125C 'exploit':22B 'gain':63B 'host':27B 'http':2A,5A,17A,29B,91C 'httpd':21B 'in-process':55B,119C 'includ':50B,114C 'insid':78B 'interpret':58B,123C 'less':44B,108C 'less-privileg':43B,107C 'let':38B 'linux':23B 'manipul':59B,138C 'mpm':37B,99C 'non':142C 'non-unix':141C 'parent':68B,133C 'prefork':36B,103C 'privileg':7A,45B,65B,109C,130C 'process':47B,57B,69B,111C,121C,134C 'releas':94C 'root':71B,85B,136C 'run':40B,52B,76B 'runtim':24B 'scoreboard':61B,140C 'script':51B,115C,122C 'self':26B 'self-host':25B 'server':3A,6A,18A,30B,88B,92C 'system':144C 'thread':49B,113C 'unix':143C 'usual':70B,135C 'vulner':9A 'worker':34B,81B,101C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-04-08T22:29:00+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-0211","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-0211","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T21:35:52+00:00","note":null},{"source":"epss","external_id":"CVE-2019-0211","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-0211","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-0211","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-0211","severity":null,"published_at":"2019-04-08T22:29:00+00:00","modified_at":"2026-06-17T02:07:58+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}