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Category:   Application (Web Server/CGI)  >   Squid Vendors:   Squid-cache.org
Squid Bugs in Processing ESI Responses Let Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code
SecurityTracker Alert ID:  1035647
SecurityTracker URL:  http://securitytracker.com/id/1035647
CVE Reference:   CVE-2016-4052, CVE-2016-4053, CVE-2016-4054   (Links to External Site)
Date:  Apr 21 2016
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 3.x prior to 3.5.17, 4.x prior to 4.0.9
Description:   Several vulnerabilities were reported in Squid. A remote user can execute arbitrary code on the target system. A remote user can cause denial of service conditions on the target system. A remote user can obtain potentially sensitive information on the target system.

A remote user can return specially crafted Edge Side Includes (ESI) responses to trigger a buffer overflow and cause denial of service conditions or execute arbitrary code on the target system [CVE-2016-4052, CVE-2016-4054].

A remote user can return specially crafted ESI responses to trigger an input validation flaw and view potentially sensitive information on the target system [CVE-2016-4053].

CESG reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.

A remote user can cause denial of service conditions.

A remote user can obtain potentially sensitive information on the target system.

Solution:   The vendor has issued a fix (3.5.17, 4.0.9).

The vendor's advisory is available at:

http://www.squid-cache.org/Advisories/SQUID-2016_6.txt

Vendor URL:  www.squid-cache.org/Advisories/SQUID-2016_6.txt (Links to External Site)
Cause:   Boundary error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 31 2016 (Red Hat Issues Fix) Squid Bugs in Processing ESI Responses Let Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
May 31 2016 (Red Hat Issues Fix) Squid Bugs in Processing ESI Responses Let Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Jun 9 2016 (Ubuntu Issues Fix) Squid Bugs in Processing ESI Responses Let Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, 15.10, and 16.04 LTS.



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