{"id":"CVE-2002-0839","url":"https://www.cyber-defence.io/tools/cve/CVE-2002-0839","generatedAt":"2026-10-27T20:51:01.933Z","title":"The shared memory scoreboard in the HTTP daemon for Apache 1.3.x before 1.3.27 allows any user running as the Apache UID to send a SIGUSR1 signal to any process as root, resulting in a denial of service (process kill) or possibly other behaviors that…","description":"The shared memory scoreboard in the HTTP daemon for Apache 1.3.x before 1.3.27 allows any user running as the Apache UID to send a SIGUSR1 signal to any process as root, resulting in a denial of service (process kill) or possibly other behaviors that would not normally be allowed, by modifying the parent[].pid and parent[].last_rtime segments in the scoreboard.","published":"2002-10-11T04:00:00.000Z","lastModified":"2026-06-16T21:58:14.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":7.2,"severity":"HIGH","vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C"},"cwe":[],"affected":["apache/http server","debian/debian linux"],"epss":{"score":0.00944,"percentile":0.60791,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.94%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"ftp://patches.sgi.com/support/free/security/advisories/20021105-01-I","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2002-10/0195.html","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2002-10/0254.html","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/vulnwatch/2002-q4/0012.html","tags":["Broken Link","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000530","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://marc.info/?l=apache-httpd-announce&m=103367938230488&w=2","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=103376585508776&w=2","tags":["Issue 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Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.iss.net/security_center/static/10280.php","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-068.php","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.linuxsecurity.com/advisories/other_advisory-2414.html","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/5884","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r8c9983f1172a3415f915ddb7e14de632d2d0c326eb1285755a024165%40%3Ccvs.httpd.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/rd00b45b93fda4a5bd013b28587207d0e00f99f6e3308dbb6025f3b01%40%3Ccvs.httpd.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/rf2f0f3611f937cf6cfb3b4fe4a67f69885855126110e1e3f2fb2728e%40%3Ccvs.httpd.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2002-0839","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}