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Category:   Application (Web Server/CGI)  >   Squid Vendors:
(Ubuntu Issues Fix) Squid Buffer Overflow in 'cachemgr.cgi' Tool Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1036069
SecurityTracker URL:
CVE Reference:   CVE-2016-4051   (Links to External Site)
Date:  Jun 9 2016
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.x, 3.x prior to 3.5.17, 4.x prior to 4.0.9
Description:   A vulnerability was reported in Squid. A remote user can cause arbitrary code to be executed on the target system.

A remote user can send specially crafted data that will be presented in the Squid manager reports. When the target administrator processes the reports via the 'cachemgr.cgi' tool, a buffer overflow occurs and arbitrary code is executed on the target system.

CESG and Yuriy M. Kaminskiy independently reported this vulnerability.

Impact:   A remote user can create data that, when processed by the target administrative user, will execute arbitrary code on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Boundary 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.
Apr 21 2016 Squid Buffer Overflow in 'cachemgr.cgi' Tool Lets Remote Users Execute Arbitrary Code

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