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Category:   Application (Web Server/CGI)  >   Squid Vendors:   Squid-cache.org
(Red Hat Issues Fix) Squid Can Be Crashed By Remote Users With Specially Crafted Authentication Headers
SecurityTracker Alert ID:  1015775
SecurityTracker URL:  http://securitytracker.com/id/1015775
CVE Reference:   CVE-2005-2917   (Links to External Site)
Date:  Mar 15 2006
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.5
Description:   A vulnerability was reported in Squid in the processing of authentication requests. A remote user can cause Squid to crash.

A remote user can supply an HTTP request with a specially crafted scheme in the authentication header to cause Squid to crash.

Mike Diggins reported this vulnerability.

Impact:   A remote user can cause the Squid process to crash.
Solution:   The vendor has released a fix.

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463 squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf squid-2.5.STABLE3-6.3E.16.i386.rpm

ia64:
3df47538a4e80892405bfc50d282d351 squid-2.5.STABLE3-6.3E.16.ia64.rpm

ppc:
ed751b16fc28691b81866f9e1bf0c90e squid-2.5.STABLE3-6.3E.16.ppc.rpm

s390:
f9dacfd1c7473deff4ef9b345cdfc1eb squid-2.5.STABLE3-6.3E.16.s390.rpm

s390x:
111ea1246d715f26199f9fd900c3bf9b squid-2.5.STABLE3-6.3E.16.s390x.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389 squid-2.5.STABLE3-6.3E.16.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463 squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf squid-2.5.STABLE3-6.3E.16.i386.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389 squid-2.5.STABLE3-6.3E.16.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463 squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf squid-2.5.STABLE3-6.3E.16.i386.rpm

ia64:
3df47538a4e80892405bfc50d282d351 squid-2.5.STABLE3-6.3E.16.ia64.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389 squid-2.5.STABLE3-6.3E.16.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463 squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf squid-2.5.STABLE3-6.3E.16.i386.rpm

ia64:
3df47538a4e80892405bfc50d282d351 squid-2.5.STABLE3-6.3E.16.ia64.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389 squid-2.5.STABLE3-6.3E.16.x86_64.rpm

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2006-0045.html

Vendor URL:  www.squid-cache.org/bugs/show_bug.cgi?id=1391 (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  3

Message History:   This archive entry is a follow-up to the message listed below.
Sep 16 2005 Squid Can Be Crashed By Remote Users With Specially Crafted Authentication Headers



 Source Message Contents

Subject:  [RHSA-2006:0045-01] Moderate: squid security update


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Moderate: squid security update
Advisory ID:       RHSA-2006:0045-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2006-0045.html
Issue date:        2006-03-15
Updated on:        2006-03-15
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2005-2917
- ---------------------------------------------------------------------

1. Summary:

Updated squid packages that fix a security vulnerability as well as
several bugs are now available.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

3. Problem description:

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

A denial of service flaw was found in the way squid processes certain NTLM
authentication requests.  A remote attacker could send a specially crafted
NTLM authentication request which would cause the Squid server to crash. 
The Common Vulnerabilities and Exposures project assigned the name
CVE-2005-2917 to this issue.

Several bugs have also been addressed in this update:

* An error introduced in 2.5.STABLE3-6.3E.14 where Squid can crash if a
user visits a site which has a long DNS record.

* Some authentication helpers were missing needed setuid rights.

* Squid couldn't handle a reply from a HTTP server when the reply began
with the new-line character or wasn't HTTP/1.0 or HTTP/1.1 compliant.

* User-defined error pages were not kept when the squid package was upgraded.

All users of squid should upgrade to these updated packages, which contain
backported patches to resolve these issues.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  Use Red Hat
Network to download and update your packages.  To launch the Red Hat
Update Agent, use the following command:

    up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

    http://www.redhat.com/docs/manuals/enterprise/

5. Bug IDs fixed (http://bugzilla.redhat.com/):

127836 - Error pages should not be replaced by updates
150781 - Squid doesn't handle headers split across packets
163595 - Squid blocks page served by broken server
165367 - Squid dies with signal 6 and restarts and dies ...
169269 - Error in script /usr/lib/squid/wbinfo_group.pl
170397 - pam authentication fails
172693 - One translated Polish language error is missing preventing squid from startup
174029 - CVE-2005-2917 Squid malformed NTLM authentication DoS


6. RPMs required:

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463  squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf  squid-2.5.STABLE3-6.3E.16.i386.rpm

ia64:
3df47538a4e80892405bfc50d282d351  squid-2.5.STABLE3-6.3E.16.ia64.rpm

ppc:
ed751b16fc28691b81866f9e1bf0c90e  squid-2.5.STABLE3-6.3E.16.ppc.rpm

s390:
f9dacfd1c7473deff4ef9b345cdfc1eb  squid-2.5.STABLE3-6.3E.16.s390.rpm

s390x:
111ea1246d715f26199f9fd900c3bf9b  squid-2.5.STABLE3-6.3E.16.s390x.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389  squid-2.5.STABLE3-6.3E.16.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463  squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf  squid-2.5.STABLE3-6.3E.16.i386.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389  squid-2.5.STABLE3-6.3E.16.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463  squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf  squid-2.5.STABLE3-6.3E.16.i386.rpm

ia64:
3df47538a4e80892405bfc50d282d351  squid-2.5.STABLE3-6.3E.16.ia64.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389  squid-2.5.STABLE3-6.3E.16.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/squid-2.5.STABLE3-6.3E.16.src.rpm
7495d78efe6e732220f27575ca00c463  squid-2.5.STABLE3-6.3E.16.src.rpm

i386:
254c24755cca96dbbe6bc127431434bf  squid-2.5.STABLE3-6.3E.16.i386.rpm

ia64:
3df47538a4e80892405bfc50d282d351  squid-2.5.STABLE3-6.3E.16.ia64.rpm

x86_64:
11895d3215d44c7dbc5f32a162395389  squid-2.5.STABLE3-6.3E.16.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2917

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2006 Red Hat, Inc.
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