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Category:   Application (Generic)  >   curl Vendors:   curl.haxx.se
libcurl Use-After-Free Connection Flaw May Let Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1036536
SecurityTracker URL:  http://securitytracker.com/id/1036536
CVE Reference:   CVE-2016-5421   (Links to External Site)
Date:  Aug 4 2016
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): libcurl 7.32.0 - 7.50.0
Description:   A vulnerability was reported in libcurl. A local user can obtain elevated privileges on the target system.

A local user can cause an application to trigger a use-after-free connection flaw in the libcurl multi interface to cause the application to perform unintended actions. A local user may be able to exploit this to gain elevated privileges.

The curl command line tool is not affected.

The vendor was notified on July 3, 2016.

Marcelo Echeverria and Fernando Munoz reported this vulnerability.

Impact:   A local user may be able to obtain elevated privileges on the target system.
Solution:   The vendor has issued a fix (7.50.1).

The vendor's advisory is available at:

https://curl.haxx.se/docs/adv_20160803C.html

Vendor URL:  curl.haxx.se/docs/adv_20160803C.html (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.
Aug 9 2016 (Ubuntu Issues Fix) libcurl Use-After-Free Connection Flaw May Let Local Users Gain Elevated Privileges
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, and 16.04 LTS.
Dec 20 2016 (Brocade Communications Systems Issues Fix for Brocade vRouter) libcurl Use-After-Free Connection Flaw May Let Local Users Gain Elevated Privileges
Brocade Communications Systems has issued a fix for Brocade vRouter.



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