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Squid Proxy Cache Security Update Advisory SQUID-2014:4
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Advisory ID: SQUID-2014:4
Date: September 15, 2014
Summary: Multiple issues in pinger ICMP processing.
Affected versions: Squid 3.x -> 3.4.7
Fixed in version: Squid 3.4.8
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/Advisories/SQUID-2014_4.txt
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7141
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7142
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Problem Description:
Due to incorrect bounds checking Squid pinger binary is
vulnerable to denial of service or information leak attack when
processing larger than normal ICMP or ICMPv6 packets.
Due to incorrect input validation Squid pinger binary is
vulnerable to denial of service or information leak attacks when
processing ICMP or ICMPv6 packets.
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Severity:
Several bugs allow any remote server to perform a denial of
service attack on the Squid service by crashing the pinger.
Some of these bugs allow attackers to leak arbitrary amounts of
information from the heap into Squid log files. This is of higher
importance than usual because the pinger process operates with
root priviliges.
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Updated Packages:
This bug is fixed by Squid version 3.4.8
In addition, patches addressing this problem for stable releases
can be found in our patch archives:
Squid 3.1:
/Versions/v3/3.1/changesets/SQUID-2014_4.patch
Squid 3.2:
/Versions/v3/3.2/changesets/squid-3.2-11830.patch
Squid 3.3:
/Versions/v3/3.3/changesets/squid-3.3-12683.patch
Squid 3.4:
/Versions/v3/3.4/changesets/squid-3.4-13173.patch
If you are using a prepackaged version of Squid then please refer
to the package vendor for availability information on updated
packages.
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Determining if your version is vulnerable:
All Squid built with --disable-icmp are not vulnerable to these
problems.
Check the server running processes list to determine if the Squid
service is running a "pinger" child process.
All unpatched Squid-2.x and Squid-3.x versions up to and
including 3.4.7 running the pinger process are vulnerable to
these problems.
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Workaround:
Configuring the firewall controlling access to Squid service such
that only ICMP ECHO packets are allowed delivery to the Squid
pinger process will limit the denial of service vulnerability.
__________________________________________________________________
Contact details for the Squid project:
For installation / upgrade support on binary packaged versions
of Squid: Your first point of contact should be your binary
package vendor.
If you install and build Squid from the original Squid sources
then the squid-users@squid-cache.org mailing list is your primary
support point. For subscription details see
/Support/mailing-lists.html.
For reporting of non-security bugs in the latest release
the squid bugzilla database should be used
http://bugs.squid-cache.org/.
For reporting of security sensitive bugs send an email to the
squid-bugs@squid-cache.org mailing list. It's a closed list
(though anyone can post) and security related bug reports are
treated in confidence until the impact has been established.
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Credits:
Several of the vulnerabilities were discovered and fixed by
Sebastian Krahmer of the OpenSUSE Project.
Some of the vulnerabilities were discovered and fixed by Amos
Jeffries of Treehouse Networks Ltd.
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Revision history:
2014-09-09 08:39 GMT Initial Report
2014-09-15 08:15 GMT Patches and Packages Released
2014-09-22 06:08 GMT CVE assignment
2015-06-12 22:41 GMT Updated patch for 3.1
__________________________________________________________________
END
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