A flaw was found in the way squid stored HTTP headers for cached objects in system memory. An attacker could cause squid to use additional memory, and trigger high CPU usage when processing requests for certain cached objects, possibly leading to a denial of service.

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

Synopsis:          Moderate: squid security update
Advisory ID:       RHSA-2007:1130-01
Advisory URL:      https://access.redhat.com/errata/RHSA-2007:1130.html
Issue date:        2007-12-18
Updated on:        2007-12-18
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2007-6239 
- ---------------------------------------------------------------------1. Summary:

Updated squid packages that fix a security issue are now available for Red
Hat Enterprise Linux 2.1, 3, 4 and 5.

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 (Advanced Server) version 2.1  - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
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
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Problem description:

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 stored HTTP headers for cached objects
in system memory. An attacker could cause squid to use additional memory,
and trigger high CPU usage when processing requests for certain cached
objects, possibly leading to a denial of service. (CVE-2007-6239)

Users of squid are advised to upgrade to these updated packages, which
contain a backported patch to resolve this issue.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  

This update is available via Red Hat Network.  Details on how to use 
the Red Hat Network to apply this update are available at

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

410181 - CVE-2007-6239 squid: DoS in cache updates

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 :

SRPMS:
ece653d214fe3de7552e4c4f105ae3a7  squid-2.4.STABLE7-1.21as.11.src.rpm

i386:
b9d27df2ff2d7dcbe20abcc424c9aba6  squid-2.4.STABLE7-1.21as.11.i386.rpm

ia64:
fe6279f75619d921cfb543f91a5ef93f  squid-2.4.STABLE7-1.21as.11.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ece653d214fe3de7552e4c4f105ae3a7  squid-2.4.STABLE7-1.21as.11.src.rpm

ia64:
fe6279f75619d921cfb543f91a5ef93f  squid-2.4.STABLE7-1.21as.11.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ece653d214fe3de7552e4c4f105ae3a7  squid-2.4.STABLE7-1.21as.11.src.rpm

i386:
b9d27df2ff2d7dcbe20abcc424c9aba6  squid-2.4.STABLE7-1.21as.11.i386.rpm

Red Hat Enterprise Linux AS version 3:

SRPMS:
33e54e551779fb32990b54b406143027  squid-2.5.STABLE3-8.3E.src.rpm

i386:
ab247e2aba77e505d88cff074849f045  squid-2.5.STABLE3-8.3E.i386.rpm
2bba9f1a118984bf1ed8814439a4ba22  squid-debuginfo-2.5.STABLE3-8.3E.i386.rpm

ia64:
6688d8d1bd5221c4eb31b55da930bb54  squid-2.5.STABLE3-8.3E.ia64.rpm
84af8ffa403a6e94daec6ce4b72ddff0  squid-debuginfo-2.5.STABLE3-8.3E.ia64.rpm

ppc:
fe42f1e938614448fedf5fe82768789f  squid-2.5.STABLE3-8.3E.ppc.rpm
0196585dbc4e874371335e0510a376e6  squid-debuginfo-2.5.STABLE3-8.3E.ppc.rpm

s390:
1b5d86c9df50e17f98e1c4bf436cc66b  squid-2.5.STABLE3-8.3E.s390.rpm
c6280fc05b9b2547b89c6895ef2fa070  squid-debuginfo-2.5.STABLE3-8.3E.s390.rpm

s390x:
74bfad18cae240d909f022fa43de5d8e  squid-2.5.STABLE3-8.3E.s390x.rpm
670d9e23a2c1775d9bc7c899ab629c59  squid-debuginfo-2.5.STABLE3-8.3E.s390x.rpm

x86_64:
0aafeeea7acb8f7c74bee676b9de8b57  squid-2.5.STABLE3-8.3E.x86_64.rpm
a032eadab80f394d7ded60ae61129dc9  squid-debuginfo-2.5.STABLE3-8.3E.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
33e54e551779fb32990b54b406143027  squid-2.5.STABLE3-8.3E.src.rpm

i386:
ab247e2aba77e505d88cff074849f045  squid-2.5.STABLE3-8.3E.i386.rpm
2bba9f1a118984bf1ed8814439a4ba22  squid-debuginfo-2.5.STABLE3-8.3E.i386.rpm

x86_64:
0aafeeea7acb8f7c74bee676b9de8b57  squid-2.5.STABLE3-8.3E.x86_64.rpm
a032eadab80f394d7ded60ae61129dc9  squid-debuginfo-2.5.STABLE3-8.3E.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
33e54e551779fb32990b54b406143027  squid-2.5.STABLE3-8.3E.src.rpm

i386:
ab247e2aba77e505d88cff074849f045  squid-2.5.STABLE3-8.3E.i386.rpm
2bba9f1a118984bf1ed8814439a4ba22  squid-debuginfo-2.5.STABLE3-8.3E.i386.rpm

ia64:
6688d8d1bd5221c4eb31b55da930bb54  squid-2.5.STABLE3-8.3E.ia64.rpm
84af8ffa403a6e94daec6ce4b72ddff0  squid-debuginfo-2.5.STABLE3-8.3E.ia64.rpm

x86_64:
0aafeeea7acb8f7c74bee676b9de8b57  squid-2.5.STABLE3-8.3E.x86_64.rpm
a032eadab80f394d7ded60ae61129dc9  squid-debuginfo-2.5.STABLE3-8.3E.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
33e54e551779fb32990b54b406143027  squid-2.5.STABLE3-8.3E.src.rpm

i386:
ab247e2aba77e505d88cff074849f045  squid-2.5.STABLE3-8.3E.i386.rpm
2bba9f1a118984bf1ed8814439a4ba22  squid-debuginfo-2.5.STABLE3-8.3E.i386.rpm

ia64:
6688d8d1bd5221c4eb31b55da930bb54  squid-2.5.STABLE3-8.3E.ia64.rpm
84af8ffa403a6e94daec6ce4b72ddff0  squid-debuginfo-2.5.STABLE3-8.3E.ia64.rpm

x86_64:
0aafeeea7acb8f7c74bee676b9de8b57  squid-2.5.STABLE3-8.3E.x86_64.rpm
a032eadab80f394d7ded60ae61129dc9  squid-debuginfo-2.5.STABLE3-8.3E.x86_64.rpm

Red Hat Enterprise Linux AS version 4:

SRPMS:
c252e79be2fcba9f696565ed87b12aae  squid-2.5.STABLE14-1.4E.el4_6.1.src.rpm

i386:
d951a7bd76166490d1a922b4772c4740  squid-2.5.STABLE14-1.4E.el4_6.1.i386.rpm
a5ee5827a0906ff45f7e10fc8ba51b7a  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.i386.rpm

ia64:
9536874e2e40bc9669b767c7cbc5c97e  squid-2.5.STABLE14-1.4E.el4_6.1.ia64.rpm
17fecd8aaa42b0c492dd35399d9640b8  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.ia64.rpm

ppc:
29979a4f2fe43d50e7cc3ab32948b956  squid-2.5.STABLE14-1.4E.el4_6.1.ppc.rpm
9216796c2778aaf5c18e8799d1568453  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.ppc.rpm

s390:
124ea7fcf76fd2ed056d57a68af45f57  squid-2.5.STABLE14-1.4E.el4_6.1.s390.rpm
e4ba12277b17cd630af314d6877a6dfe  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.s390.rpm

s390x:
53c5859f6826ee234bd3f2fc7268c79a  squid-2.5.STABLE14-1.4E.el4_6.1.s390x.rpm
15bd808af4138103f0055fe9cceae769  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.s390x.rpm

x86_64:
463f654fc16dff0e65728f111f9e685f  squid-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm
17e7ad34be5eb825cfbecce3a41c877b  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
c252e79be2fcba9f696565ed87b12aae  squid-2.5.STABLE14-1.4E.el4_6.1.src.rpm

i386:
d951a7bd76166490d1a922b4772c4740  squid-2.5.STABLE14-1.4E.el4_6.1.i386.rpm
a5ee5827a0906ff45f7e10fc8ba51b7a  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.i386.rpm

x86_64:
463f654fc16dff0e65728f111f9e685f  squid-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm
17e7ad34be5eb825cfbecce3a41c877b  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
c252e79be2fcba9f696565ed87b12aae  squid-2.5.STABLE14-1.4E.el4_6.1.src.rpm

i386:
d951a7bd76166490d1a922b4772c4740  squid-2.5.STABLE14-1.4E.el4_6.1.i386.rpm
a5ee5827a0906ff45f7e10fc8ba51b7a  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.i386.rpm

ia64:
9536874e2e40bc9669b767c7cbc5c97e  squid-2.5.STABLE14-1.4E.el4_6.1.ia64.rpm
17fecd8aaa42b0c492dd35399d9640b8  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.ia64.rpm

x86_64:
463f654fc16dff0e65728f111f9e685f  squid-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm
17e7ad34be5eb825cfbecce3a41c877b  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
c252e79be2fcba9f696565ed87b12aae  squid-2.5.STABLE14-1.4E.el4_6.1.src.rpm

i386:
d951a7bd76166490d1a922b4772c4740  squid-2.5.STABLE14-1.4E.el4_6.1.i386.rpm
a5ee5827a0906ff45f7e10fc8ba51b7a  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.i386.rpm

ia64:
9536874e2e40bc9669b767c7cbc5c97e  squid-2.5.STABLE14-1.4E.el4_6.1.ia64.rpm
17fecd8aaa42b0c492dd35399d9640b8  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.ia64.rpm

x86_64:
463f654fc16dff0e65728f111f9e685f  squid-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm
17e7ad34be5eb825cfbecce3a41c877b  squid-debuginfo-2.5.STABLE14-1.4E.el4_6.1.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

SRPMS:
30db384fc837a2b7cfe3be12c80bfed0  squid-2.6.STABLE6-5.el5_1.2.src.rpm

i386:
172091586b423ff41d70b9a2d9fead00  squid-2.6.STABLE6-5.el5_1.2.i386.rpm
482ac42a07e452a26a5805e9f5c1532d  squid-debuginfo-2.6.STABLE6-5.el5_1.2.i386.rpm

x86_64:
76876b1c2f21b013ab81b2203cc274c2  squid-2.6.STABLE6-5.el5_1.2.x86_64.rpm
37a3b6a430820be138def86fdcba002e  squid-debuginfo-2.6.STABLE6-5.el5_1.2.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

SRPMS:
30db384fc837a2b7cfe3be12c80bfed0  squid-2.6.STABLE6-5.el5_1.2.src.rpm

i386:
172091586b423ff41d70b9a2d9fead00  squid-2.6.STABLE6-5.el5_1.2.i386.rpm
482ac42a07e452a26a5805e9f5c1532d  squid-debuginfo-2.6.STABLE6-5.el5_1.2.i386.rpm

ia64:
4eaa32cfae9667e7b96a6a756bff1559  squid-2.6.STABLE6-5.el5_1.2.ia64.rpm
932751869d724a6c9e6723c45ab3f2e9  squid-debuginfo-2.6.STABLE6-5.el5_1.2.ia64.rpm

ppc:
404a22e1fd3ff9282e83c166d4c43307  squid-2.6.STABLE6-5.el5_1.2.ppc.rpm
8b3bdb5fd4c27327e6489ff6da4cf2ae  squid-debuginfo-2.6.STABLE6-5.el5_1.2.ppc.rpm

s390x:
3e74a922b55cbdff9486079828d73582  squid-2.6.STABLE6-5.el5_1.2.s390x.rpm
85e86189294f374cd0655ef0d0bfcd1e  squid-debuginfo-2.6.STABLE6-5.el5_1.2.s390x.rpm

x86_64:
76876b1c2f21b013ab81b2203cc274c2  squid-2.6.STABLE6-5.el5_1.2.x86_64.rpm
37a3b6a430820be138def86fdcba002e  squid-debuginfo-2.6.STABLE6-5.el5_1.2.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://access.redhat.com/security/team/key/#package

7. References:

https://www.cve.org/CVERecord?id=CVE-2007-6239
https://access.redhat.com/security/updates/classification#moderate

8. Contact:

The Red Hat security contact is .  More contact
details at https://access.redhat.com/security/team/contact

Copyright 2007 Red Hat, Inc.