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[SECURITY] [DLA 478-1] squid3 security update

Package        : squid3
Version        : 3.1.20-2.2+deb7u5
CVE ID         : CVE-2016-4051 CVE-2016-4052 CVE-2016-4053 CVE-2016-4054
                 CVE-2016-4554 CVE-2016-4555 CVE-2016-4556
Debian Bug     : 823968

Several security issues have been discovered in the Squid caching proxy.


    CESG and Yuriy M. Kaminskiy discovered that Squid cachemgr.cgi
    was vulnerable to a buffer overflow when processing remotely supplied
    inputs relayed through Squid.


    CESG discovered that a buffer overflow made Squid vulnerable to a
    Denial of Service (DoS) attack when processing ESI responses.


    CESG found that Squid was vulnerable to public information disclosure
    of the server stack layout when processing ESI responses.


    CESG discovered that Squid was vulnerable to remote code execution
    when processing ESI responses.


    Jianjun Chen found that Squid was vulnerable to a header smuggling
    attack that could lead to cache poisoning and to bypass of same-origin
    security policy in Squid and some client browsers.

CVE-2016-4555 and CVE-2016-4556

    "bfek-18" and "@vftable" found that Squid was vulnerable to a Denial
    of Service (DoS) attack when processing ESI responses, due to
    incorrect pointer handling and reference counting.

For Debian 7 "Wheezy", these issues have been fixed in squid3 version
3.1.20-2.2+deb7u5. We recommend you to upgrade your squid3 packages.

Learn more about the Debian Long Term Support (LTS) Project and how to
apply these updates at: https://wiki.debian.org/LTS/

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