{"id":"CVE-2017-9798","details":"Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.","modified":"2026-04-16T06:17:30.926069723Z","published":"2017-09-18T15:29:00.307Z","related":["SUSE-SU-2017:2542-1","SUSE-SU-2017:2718-1","SUSE-SU-2017:2756-1","SUSE-SU-2017:2907-1","openSUSE-SU-2024:10623-1"],"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E"},{"type":"WEB","url":"http://seclists.org/fulldisclosure/2024/Sep/22"},{"type":"ADVISORY","url":"https://support.apple.com/HT208331"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/100872"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/105598"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3240"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3475"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:2882"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3194"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3195"},{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2017-9798"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201710-32"},{"type":"ADVISORY","url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us"},{"type":"ADVISORY","url":"https://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/core.c?r1=1805223&r2=1807754&pathrev=1807754&view=patch"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3113"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3193"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3477"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3239"},{"type":"ADVISORY","url":"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2017-9798"},{"type":"ADVISORY","url":"https://www.tenable.com/security/tns-2019-09"},{"type":"ADVISORY","url":"http://openwall.com/lists/oss-security/2017/09/18/2"},{"type":"ADVISORY","url":"http://www.debian.org/security/2017/dsa-3980"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:2972"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20180601-0003/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3018"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3114"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1039387"},{"type":"ADVISORY","url":"ht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