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CVE-2017-9798

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Date: September 18, 2017

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.

Language: C

Severity Score

7.5

Related Resources (59)

Url: https://blog.fuzzing-project.org/60-Optionsbleed-HTTP-OPTIONS-method-can-leak-Apaches-server-memory.html

Url: https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E

Url: http://www.securityfocus.com/bid/105598

Url: https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E

Url: http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html

Url: https://nvd.nist.gov/vuln/detail/CVE-2017-9798

Url: https://access.redhat.com/errata/RHSA-2017:2972

Url: https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E

Url: https://www.tenable.com/security/tns-2019-09

Url: https://github.com/hannob/optionsbleed

Url: https://access.redhat.com/errata/RHSA-2017:3018

Url: https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E

Url: https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Url: http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html

Url: https://security-tracker.debian.org/tracker/CVE-2017-9798

Url: https://security.netapp.com/advisory/ntap-20180601-0003/

Url: https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E

Url: https://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/core.c?r1=1805223&r2=1807754&pathrev=1807754&view=patch

Url: https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html

Url: https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E

Url: https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E

Url: https://access.redhat.com/errata/RHSA-2017:2882

Url: https://blog.fuzzing-project.org/uploads/apache-2.2-optionsbleed-backport.patch

Url: https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E

Url: http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html

Url: https://github.com/apache/httpd/commit/4cc27823899e070268b906ca677ee838d07cf67a

Url: https://access.redhat.com/errata/RHSA-2017:3240

Url: https://support.apple.com/HT208331

Url: https://www.exploit-db.com/exploits/42745/

Url: https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2017-9798

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2017-9798

Url: https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E

Url: https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E

Url: https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E

Url: http://openwall.com/lists/oss-security/2017/09/18/2

Url: https://access.redhat.com/security/cve/CVE-2017-9798

Url: https://access.redhat.com/errata/RHSA-2017:3239

Url: http://www.debian.org/security/2017/dsa-3980

Url: https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E

Url: http://www.securityfocus.com/bid/100872

Url: http://www.securitytracker.com/id/1039387

Url: https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us

Url: https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E

Url: http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html

Url: https://access.redhat.com/errata/RHSA-2017:3195

Url: https://lists.apache.org/thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770%40%3Ccvs.httpd.apache.org%3E

Url: https://access.redhat.com/errata/RHSA-2017:3193

Url: https://access.redhat.com/errata/RHSA-2017:3194

Url: https://access.redhat.com/errata/RHSA-2017:3475

Url: https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E

Url: https://access.redhat.com/errata/RHSA-2017:3113

Url: https://access.redhat.com/errata/RHSA-2017:3476

Url: https://access.redhat.com/errata/RHSA-2017:3114

Url: https://access.redhat.com/errata/RHSA-2017:3477

Url: https://security.gentoo.org/glsa/201710-32

Url: https://lists.apache.org/thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be%40%3Ccvs.httpd.apache.org%3E

Url: https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E

Url: https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E

Url: https://www.mend.io/vulnerability-database/CVE-2017-9798

Severity Score

7.5

Weakness Type (CWE)

Use After Free

CWE-416

Top Fix

Upgrade Version

Upgrade to version 2.4.28

CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	NONE
Availability (A):	NONE

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	NONE
Availability (A):	NONE
Additional information:

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