National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

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.

Source:  MITRE
Description Last Modified:  09/18/2017
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 3.9


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 v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information

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.securityfocus.com/bid/100872 Third Party Advisory VDB Entry
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://security.gentoo.org/glsa/201710-32
https://security.netapp.com/advisory/ntap-20180601-0003/
https://security-tracker.debian.org/tracker/CVE-2017-9798 Third Party Advisory
https://support.apple.com/HT208331
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

Technical Details

Vulnerability Type (View All)

Change History

14 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-9798
NVD Published Date:
09/18/2017
NVD Last Modified:
07/18/2018