Date:         Wed, 7 Apr 2010 13:28:36 -0500
Reply-To:     Troy Dawson 
Sender:       Security Errata for Scientific Linux
              
From:         Troy Dawson 
Subject:      Security ERRATA Low: squid on SL5.x i386/x86_64
Comments: To: "scientific-linux-errata@fnal.gov"
          

Synopsis:	Low: squid security and bug fix update
Issue date:	2010-03-30
CVE Names:	CVE-2009-2855 CVE-2010-0308

A flaw was found in the way Squid processed certain external ACL helper
HTTP header fields that contained a delimiter that was not a comma. A
remote attacker could issue a crafted request to the Squid server, 
causing excessive CPU use (up to 100%). (CVE-2009-2855)

Note: The CVE-2009-2855 issue only affected non-default configurations 
that use an external ACL helper script.

A flaw was found in the way Squid handled truncated DNS replies. A 
remote attacker able to send specially-crafted UDP packets to Squid's 
DNS client port could trigger an assertion failure in Squid's child 
process, causing that child process to exit. (CVE-2010-0308)

This update also fixes the following bugs:

* Squid's init script returns a non-zero value when trying to stop a
stopped service. This is not LSB compliant and can generate difficulties 
in cluster environments. This update makes stopping LSB compliant. 
(BZ#521926)

* Squid is not currently built to support MAC address filtering in ACLs.
This update includes support for MAC address filtering. (BZ#496170)

* Squid is not currently built to support Kerberos negotiate
authentication. This update enables Kerberos authentication. (BZ#516245)

* Squid does not include the port number as part of URIs it constructs 
when configured as an accelerator. This results in a 403 error. This 
update corrects this behavior. (BZ#538738)

* the error_map feature does not work if the same handling is set also 
on the HTTP server that operates in deflate mode. This update fixes this
issue. (BZ#470843)

After installing this update, the squid service will be restarted 
automatically.

SL 5.x

     SRPMS:
squid-2.6.STABLE21-6.el5.src.rpm
     i386:
squid-2.6.STABLE21-6.el5.i386.rpm
     x86_64:
squid-2.6.STABLE21-6.el5.x86_64.rpm

-Connie Sieh
-Troy Dawson