{"id":"CVE-2009-1235","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-1235","generatedAt":"2026-10-27T19:39:41.381Z","title":"XNU 1228.9.59 and earlier on Apple Mac OS X 10.5.6 and earlier does not properly restrict interaction between user space and the HFS IOCTL handler, which allows local users to overwrite kernel memory and gain privileges by attaching an HFS+ disk image…","description":"XNU 1228.9.59 and earlier on Apple Mac OS X 10.5.6 and earlier does not properly restrict interaction between user space and the HFS IOCTL handler, which allows local users to overwrite kernel memory and gain privileges by attaching an HFS+ disk image and performing certain steps involving HFS_GET_BOOT_INFO fcntl calls.","published":"2009-04-02T17:30:00.000Z","lastModified":"2026-06-16T23:06:50.000Z","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":["CWE-264"],"affected":["apple/mac os x","apple/mac os x server"],"epss":{"score":0.00979,"percentile":0.61941,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2009-03-23","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":8266,"kind":"exploit","title":"Apple Mac OSX xnu 1228.x - 'hfs-fcntl' Kernel Privilege Escalation","url":"https://www.exploit-db.com/exploits/8266","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/osx/local/8266.sh","file":"exploits/osx/local/8266.sh","published":"2009-03-23","added":"2009-03-22","updated":null,"author":"mu-b","type":"local","platform":"osx","port":null,"verified":true,"codes":["OSVDB-53333","CVE-2009-1235"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"A public exploit is published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 1.0%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use."},"changes":[],"references":[{"url":"http://lists.apple.com/archives/security-announce/2009/Aug/msg00001.html","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/34424","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/36096","source":"cve@mitre.org"},{"url":"http://support.apple.com/kb/HT3757","source":"cve@mitre.org"},{"url":"http://www.digit-labs.org/files/exploits/xnu-hfs-fcntl-v2.c","tags":["Exploit"],"source":"cve@mitre.org"},{"url":"http://www.digit-labs.org/files/exploits/xnu-hfs-fcntl-v2.sh","tags":["Exploit"],"source":"cve@mitre.org"},{"url":"http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/34203","tags":["Exploit"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id?1022671","source":"cve@mitre.org"},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-218A.html","tags":["US Government Resource"],"source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2009/0822","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2009/2172","source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/8266","source":"cve@mitre.org"},{"url":"http://lists.apple.com/archives/security-announce/2009/Aug/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/34424","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36096","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://support.apple.com/kb/HT3757","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.digit-labs.org/files/exploits/xnu-hfs-fcntl-v2.c","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.digit-labs.org/files/exploits/xnu-hfs-fcntl-v2.sh","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/34203","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1022671","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-218A.html","tags":["US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/0822","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/2172","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/8266","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-1235","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."}