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Category:   Application (Web Server/CGI)  >   Apache HTTPD Vendors:   Apache Software Foundation
Apache HTTPD HTTP/2 Header Processing Lets Remote Users Consume Excessive Memory Resources
SecurityTracker Alert ID:  1037388
SecurityTracker URL:  http://securitytracker.com/id/1037388
CVE Reference:   CVE-2016-8740   (Links to External Site)
Updated:  Dec 21 2016
Original Entry Date:  Dec 5 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.4.17 - 2.4.23
Description:   A vulnerability was reported in Apache HTTPD. A remote user can consume excessive memory on the target system.

The system does not properly limit request headers sent via the HTTP/2 protocol. A remote user can send specially crafted header values to consume excessive memory on the target system and prevent requests from being processed.

The vulnerable mod_http2 module is not compiled in by default and is not enabled by default.

Naveen Tiwari and CDF/SEFCOM at Arizona State University reported this vulnerability.

Impact:   A remote user can consume excessive memory resources on the target system.
Solution:   The vendor has issued a fix (2.4.25).

The vendor advisory is available at:

http://httpd.apache.org/security/vulnerabilities_24.html

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

Message History:   This archive entry has one or more follow-up message(s) listed below.
Mar 30 2017 (HPE Issues Fix) Apache HTTPD HTTP/2 Header Processing Lets Remote Users Consume Excessive Memory Resources
HPE has issued a fix for HP-UX 11.31.



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