CVE-2017-9798

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    CVE-2017-9798

    Published: 18 Sept 2017Last Modified: 8 Jul 2026

    Summary:

    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.

    References: http://seclists.org/fulldisclosure/2024/Sep/22, https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E, https://lists.apache.org/thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770%40%3Ccvs.httpd.apache.org%3E, http://openwall.com/lists/oss-security/2017/09/18/2, http://www.debian.org/security/2017/dsa-3980, http://www.securityfocus.com/bid/100872, http://www.securityfocus.com/bid/105598, http://www.securitytracker.com/id/1039387, https://access.redhat.com/errata/RHSA-2017:2882, https://access.redhat.com/errata/RHSA-2017:2972, https://access.redhat.com/errata/RHSA-2017:3018, https://access.redhat.com/errata/RHSA-2017:3113, https://access.redhat.com/errata/RHSA-2017:3114, https://access.redhat.com/errata/RHSA-2017:3193, https://access.redhat.com/errata/RHSA-2017:3194, https://access.redhat.com/errata/RHSA-2017:3195, https://access.redhat.com/errata/RHSA-2017:3239, https://access.redhat.com/errata/RHSA-2017:3240, https://access.redhat.com/errata/RHSA-2017:3475, https://access.redhat.com/errata/RHSA-2017:3476, https://access.redhat.com/errata/RHSA-2017:3477, https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2017-9798, https://security-tracker.debian.org/tracker/CVE-2017-9798, https://security.gentoo.org/glsa/201710-32, https://security.netapp.com/advisory/ntap-20180601-0003/, https://support.apple.com/HT208331, https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us, https://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/core.c?r1=1805223&r2=1807754&pathrev=1807754&view=patch, https://www.tenable.com/security/tns-2019-09, http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html, http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html, http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html, http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html, https://blog.fuzzing-project.org/60-Optionsbleed-HTTP-OPTIONS-method-can-leak-Apaches-server-memory.html, https://blog.fuzzing-project.org/uploads/apache-2.2-optionsbleed-backport.patch, https://github.com/apache/httpd/commit/4cc27823899e070268b906ca677ee838d07cf67a, https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html, https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html, https://github.com/hannob/optionsbleed, https://www.exploit-db.com/exploits/42745/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.4.0
    2.4.1
    2.4.10
    2.4.12
    2.4.16
    2.4.17
    2.4.18
    2.4.2
    2.4.20
    2.4.23
    2.4.25
    2.4.26
    2.4.27
    2.4.3
    2.4.4
    2.4.6
    2.4.7
    2.4.9

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2017-9798 | CVE-DB