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Category:   Application (Generic)  >   curl Vendors:   curl.haxx.se
libcurl CURLOPT_HTTPHEADER Option Discloses Potentially Sensitive Information to Remote Users
SecurityTracker Alert ID:  1032233
SecurityTracker URL:  http://securitytracker.com/id/1032233
CVE Reference:   CVE-2015-3153   (Links to External Site)
Date:  May 4 2015
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 7.1 - 7.42.0
Description:   A vulnerability was reported in cURL. A remote user can obtain potentially sensitive information on the target system.

By default, the CURLOPT_HTTPHEADER option (and the curl command-line '--header' option) sends the custom HTTP header to both the destination host and any intermediate proxy by design. However, some application developers may not expect the header to be sent to the proxy. The proxy or a remote user monitoring the network can obtain potentially sensitive information in the HTTP headers.

The vendor was notified on March 12 2015.

Yehezkel Horowitz and Oren Souroujon reported this vulnerability.

Impact:   A remote user can obtain potentially sensitive information on the target system.
Solution:   The vendor has issued a fix (7.42.1).

The vendor's advisory is available at:

http://curl.haxx.se/docs/adv_20150429.html

Vendor URL:  curl.haxx.se/docs/adv_20150429.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 4 2015 (Ubuntu Issues Fix) libcurl CURLOPT_HTTPHEADER Option Discloses Potentially Sensitive Information to Remote Users
Ubuntu has issued a fix for Ubuntu 12.04 LTS, 14.04 LTS, 14.10, and 15.04.
Oct 6 2015 (IBM Issues Fix for IBM Rational ClearCase) libcurl CURLOPT_HTTPHEADER Option Discloses Potentially Sensitive Information to Remote Users
IBM has issued a fix for IBM Rational ClearCase.



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