RHEL 5 : squid (RHSA-2010:0221)

This script is Copyright (C) 2010-2014 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing a security update.

Description :

An updated squid package that fixes two security issues and several
bugs is now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

Squid is a high-performance proxy caching server for web clients,
supporting FTP, Gopher, and HTTP data objects.

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)

All users of squid should upgrade to this updated package, which
resolves these issues. After installing this update, the squid service
will be restarted automatically.

See also :

https://www.redhat.com/security/data/cve/CVE-2009-2855.html
https://www.redhat.com/security/data/cve/CVE-2010-0308.html
http://rhn.redhat.com/errata/RHSA-2010-0221.html

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)
CVSS Temporal Score : 4.1
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 46285 ()

Bugtraq ID: 36091
37522

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