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Category:   Application (Web Server/CGI)  >   Apache HTTPD Vendors:   Apache Software Foundation
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:  1039387
SecurityTracker URL:  http://securitytracker.com/id/1039387
CVE Reference:   CVE-2017-9798   (Links to External Site)
Updated:  Oct 5 2017
Original Entry Date:  Sep 19 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:   The vendor has issued a fix (2.4.28).

The vendor has also issued a source code fix, available at:

https://svn.apache.org/viewvc?view=revision&revision=1807754

Vendor URL:  httpd.apache.org/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 19 2017 (Ubuntu 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
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS, 16.04 LTS, and 17.04.
Oct 11 2017 (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
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Oct 11 2017 (Oracle Issues Fix for Oracle Linux) 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
Oracle has issued a fix for Oracle Linux 7.
Oct 12 2017 (CentOS 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
CentOS has issued a fix for CentOS 7.
Oct 19 2017 (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
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Oct 20 2017 (Oracle Issues Fix for Oracle Linux) 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
Oracle has issued a fix for Oracle Linux 6.
Oct 23 2017 (CentOS 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
CentOS has issued a fix for CentOS 6.
Oct 24 2017 (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
Red Hat has issued a fix for Red Hat Enterprise Linux 6, 6.7, 7, 7.3, and 7.4.
Oct 25 2017 (Ubuntu 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
Ubuntu has issued a fix for Ubuntu Linux 12.04 ESM.
Nov 13 2017 (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
Red Hat has issued a fix for Red Hat Enterprise Linux 6.7.
Nov 13 2017 (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
Red Hat has issued a fix for Red Hat Enterprise Linux 7.3.
Nov 13 2017 (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
Red Hat has issued a fix for Red Hat Enterprise Linux 7.2.
Dec 5 2017 (IBM Issues Fix for IBM WebSphere Application Server) 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
IBM has issued a fix for IBM WebSphere Application Server.
Jan 17 2018 (Oracle Issues Fix for Oracle HTTP Server) 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
Oracle has issued a fix for Oracle HTTP Server.
Apr 18 2018 (Oracle Issues Fix for Sun Secure Global Desktop) 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
Oracle has issued a fix for Sun Secure Global Desktop.
Jun 21 2018 (IBM Issues Fix for IBM Security Access Manager Appliance) 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
IBM has issued a fix for IBM Security Access Manager Appliance.
Oct 16 2018 (Oracle Issues Fix for Oracle PeopleSoft Products) 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
Oracle has issued a fix for Oracle PeopleSoft Products.



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