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Category:   Application (Generic)  >   cURL Vendors:   curl.haxx.se
cURL/libcurl TLS Session Resumption Client Certificate Bug Lets Remote Users Bypass Security Restrictions on the Target System
SecurityTracker Alert ID:  1038341
SecurityTracker URL:  http://securitytracker.com/id/1038341
CVE Reference:   CVE-2016-5419, CVE-2017-7468   (Links to External Site)
Date:  Apr 21 2017
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7.52.0 - 7.53.1
Description:   A vulnerability was reported in cURL. A remote user can bypass security controls on the target system.

The library may resume using a TLS session when the client certificate has changed. As a result, an application may be able to send data using incorrect authentication data.

The command line tool is also affected.

The vendor was notified on March 21, 2017.

lijian996 at users.noreply.github.com reported this vulnerability.

Impact:   An application may be able to send data using incorrect authentication data.
Solution:   The vendor has issued a fix (7.54.0).

The vendor advisory is available at:

https://curl.haxx.se/docs/adv_20170419.html

Vendor URL:  curl.haxx.se/docs/adv_20170419.html (Links to External Site)
Cause:   Authentication 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.
Apr 21 2017 (Ubuntu Issues Fix) cURL/libcurl TLS Session Resumption Client Certificate Bug Lets Remote Users Bypass Security Restrictions on the Target System
Ubuntu has issued a fix for Ubuntu Linux 17.04.



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