__________________________________________________________________
Squid Proxy Cache Security Update Advisory SQUID-2010:1
__________________________________________________________________
Advisory ID: SQUID-2010:1
Date: January 28, 2010
Summary: Denial of Service issue in DNS handling
Affected versions: Squid 2.x -> 2.6.STABLE24,
Squid 2.7 -> 2.7.STABLE8,
Squid 3.0 -> 3.0.STABLE22,
Squid 3.1 -> 3.1.0.15
Fixed in version: Squid 2.6.STABLE24, 2.7.STABLE8
Squid 3.0.STABLE23, 3.1.0.16
__________________________________________________________________
/Advisories/SQUID-2010_1.txt
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0308
__________________________________________________________________
Problem Description:
Due to incorrect data validation Squid is vulnerable to a denial
of service attack when processing specially crafted DNS packets.
__________________________________________________________________
Severity:
This problem allows any trusted client or external server who can
determine the squid receiving port to perform a short-term denial
of service attack on the Squid service.
__________________________________________________________________
Updated Packages:
This bug is fixed by Squid versions 2.6.STABLE24, 2.7.STABLE8,
3.0.STABLE23 and 3.1.0.16.
In addition, patches addressing these problems can be found In
our patch archives.
Squid 2.x:
/Versions/v2/HEAD/changesets/12597.patch
Squid 3.0:
/Versions/v3/3.0/changesets/squid-3.0-9163.patch
Squid 3.1:
/Versions/v3/3.1/changesets/squid-3.1-9853.patch
If you are using a prepackaged version of Squid then please refer
to the package vendor for availability information on updated
packages.
__________________________________________________________________
Determining if your version is vulnerable:
Squid still using the obsolete dnsserver are not vulnerable.
The ignore_unknown_nameservers option affects the severity of
this vulnerability. When set to "on" (the default) risk is low.
When set to "off" the vulnerability risk is increased.
All unpatched Squid-3.0 versions up to and including 3.0.STABLE22
are vulnerable.
All unpatched Squid-3.1 versions up to and including 3.1.0.15 are
vulnerable.
All unpatched Squid-2.7 versions up to and including 2.7.STABLE8
are vulnerable.
All unpatched Squid-2.x versions up to and including 2.6.STABLE24
are vulnerable.
__________________________________________________________________
Workarounds:
Using all of the following steps are required to protect a
vulnerable Squid from this and other forms of DNS attack.
* Ensuring the ignore_unknown_nameservers is turned on.
* Ensuring that DNS packets cannot be sent to Squid from
untrusted nameservers or other machines.
The most secure implementation of these requirements is to use
a nameserver running on the localhost IP dedicated for secure use
by Squid and any other services on the Squid machine.
__________________________________________________________________
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 your 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
.
For reporting of non-security bugs in the latest STABLE release
the squid bugzilla database should be used
.
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.
__________________________________________________________________
Credits:
Zero-Day attributed to work by Fabian Yamaguchi.
The vulnerability was reported by Tomas Hoger of RedHat.
__________________________________________________________________
Revision history:
2010-01-14 18:05 GMT Initial Report
2010-01-16 03:51 GMT Patches released.
2010-02-01 04:49 GMT Squid-3 bundled fixes and advisory released.
2010-02-02 07:42 GMT Updated 3.0 patch and bundle
2010-02-06 02:35 GMT CVE-2010-0308 reference added.
2010-09-16 07:05 GMT Reference link updates
2011-04-12 02:05 GMT Updated info on 2.6 and 2.7 being patched
__________________________________________________________________
END
387 Captain Parks, however, agreed with Mr. Everdail, who trusted him absolutely—if Sandy did not—that it would be wise not to give any person who had been on the yacht during its crossing any chance to get away. Felipa stood leaning listlessly against the post of the ramada, watching them. After a time she went into the adobe and came out with a pair of field-glasses, following the course of the command as it wound along among the foot-hills. The day dragged dully along. She was uneasy about her husband, her nerves were shaken with the coffee and quinine, and she was filled,[Pg 76] moreover, with a vague restlessness. She would have sent for her horse and gone out even in the clouds of dust and the wind like a hot oven, but Landor had forbidden her to leave the post. Death in the tip of a poisoned arrow, at the point of a yucca lance, or from a more merciful bullet of lead, might lurk behind any mesquite bush or gray rock. Chapter 9 "Very well," answered the Deacon a little stiffly, for he was on his guard against cordial strangers. "Deed he was," answered Si. "He and his fathers before him run' this whole neck o' woods accordin' to the big Injun taste, and give the Army o' the United States all they wanted to do. Used to knock all the other Injuns around here about like ten-pins. The Rosses were bosses from the word go." Little Pete had an idea. He wriggled in between, snatched the glasses, and made off with them. Dara looked away. "I have my song," she said. HoME日韩一级特黄高清免费自拍
ENTER NUMBET 0017
www.ranli8.net.cn
nasi9.net.cn
xiyin0.com.cn
www.pinxi7.com.cn
lame1.com.cn
www.fasuo7.net.cn
www.toude3.com.cn
maome3.net.cn
www.fenni5.com.cn
erwei1.com.cn