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Category:   Application (Web Server/CGI)  >   Apache HTTPD Vendors:   Apache Software Foundation
(Red Hat Issues Fix) Apache HTTPD Use-After-Free Memory Error in Processing HTTP OPTIONS Requests Lets Remote Users Obtain Potentially Sensitive Information on the Target System in Certain Cases
SecurityTracker Alert ID:  1039768
SecurityTracker URL:  http://securitytracker.com/id/1039768
CVE Reference:   CVE-2017-9798   (Links to External Site)
Date:  Nov 13 2017
Impact:   Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.4.28
Description:   A vulnerability was reported in Apache HTTPD. A remote user can obtain potentially sensitive information on the target system in certain cases.

On systems with the Limit directive set within a '.htaccess' file and set to an invalid HTTP method, a remote user can send a specially crafted HTTP OPTIONS request for a path to trigger a use-after-free memory error and view potentially sensitive information from process memory on the target system.

This vulnerability is referred to as "Optionsbleed".

The original advisory is available at:

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

Hanno Bock reported this vulnerability.

Impact:   A remote user can obtain potentially sensitive information on the target system in certain cases.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

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

Vendor URL:  access.redhat.com/errata/RHSA-2017:3193 (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  7.2

Message History:   This archive entry is a follow-up to the message listed below.
Sep 19 2017 Apache HTTPD Use-After-Free Memory Error in Processing HTTP OPTIONS Requests Lets Remote Users Obtain Potentially Sensitive Information on the Target System in Certain Cases



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