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Category:   Application (Web Server/CGI)  >   Squid Vendors:   Squid-cache.org
(Ubuntu Issues Fix) Squid Lets Remote Users Bypass Same-Origin Restrictions on the Target System
SecurityTracker Alert ID:  1036072
SecurityTracker URL:  http://securitytracker.com/id/1036072
CVE Reference:   CVE-2016-4554   (Links to External Site)
Date:  Jun 9 2016
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.x - 3.5.17
Description:   A vulnerability was reported in Squid. A remote user can bypass same origin restrictions on the target system.

A remote user can supply a specially crafted header value to bypass same-origin restrictions on the Host header and poison the proxy cache.

Jianjun Chen from Tsinghua University reported this vulnerability.

Impact:   A remote user can bypass same origin restrictions and poison the proxy cache on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

http://www.ubuntu.com/usn/usn-2995-1

Vendor URL:  www.ubuntu.com/usn/usn-2995-1 (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  12.04 LTS, 14.04 LTS, 15.10, 16.04 LTS

Message History:   This archive entry is a follow-up to the message listed below.
May 6 2016 Squid Lets Remote Users Bypass Same-Origin Restrictions on the Target System



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