Scientific Linux Security Update : squid on SL5.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing a security update.

Description :

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.

See also :

http://www.nessus.org/u?d1c37ebc
https://bugzilla.redhat.com/show_bug.cgi?id=470843
https://bugzilla.redhat.com/show_bug.cgi?id=496170
https://bugzilla.redhat.com/show_bug.cgi?id=516245
https://bugzilla.redhat.com/show_bug.cgi?id=521926
https://bugzilla.redhat.com/show_bug.cgi?id=538738

Solution :

Update the affected squid package.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 60775 ()

Bugtraq ID:

CVE ID: CVE-2009-2855
CVE-2010-0308