CVE-2017-9798 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://openwall.com/lists/oss-security/2017/09/18/2 Mailing List  VDB Entry 
http://www.debian.org/security/2017/dsa-3980
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
http://www.securityfocus.com/bid/100872 Third Party Advisory  VDB Entry 
http://www.securityfocus.com/bid/105598
http://www.securitytracker.com/id/1039387 Third Party Advisory  VDB Entry 
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://blog.fuzzing-project.org/60-Optionsbleed-HTTP-OPTIONS-method-can-leak-Apaches-server-memory.html Exploit  Patch  Technical Description  Third Party Advisory 
https://blog.fuzzing-project.org/uploads/apache-2.2-optionsbleed-backport.patch Exploit  Patch  Technical Description  Third Party Advisory 
https://github.com/apache/httpd/commit/29afdd2550b3d30a8defece2b95ae81edcf66ac9 Patch  Third Party Advisory 
https://github.com/hannob/optionsbleed Exploit  Third Party Advisory 
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2017-9798
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b@%3Ccvs.httpd.apache.org%3E
https://security-tracker.debian.org/tracker/CVE-2017-9798 Third Party Advisory 
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 Vendor Advisory 
https://www.exploit-db.com/exploits/42745/ Exploit  Third Party Advisory  VDB Entry 
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.tenable.com/security/tns-2019-09

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

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Change History

24 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-9798
NVD Published Date:
09/18/2017
NVD Last Modified:
04/23/2019
Source:
MITRE