(Red Hat Issues Fix) Squid SNMP Parsing Error Lets Remote Users Restart the Proxy Server
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SecurityTracker Alert ID: 1011815 |
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SecurityTracker URL: http://securitytracker.com/id/1011815
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CVE Reference:
CAN-2004-0918
(Links to External Site)
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Date: Oct 20 2004
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 2.5-STABLE6, 3.0-PRE3-20040702; when compiled with SNMP support
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Description:
iDEFENSE reported a vulnerability in Squid in the SNMP service. A remote user can cause denial of service conditions.
It is reported that a remote user can supply a specially crafted SNMP packet to trigger an ASN1 parsing error and cause Squid to restart, dropping all current connections.
The flaw resides in the asn_parse_header() function in 'snmplib/asn1.c'.
The system is affected if compiled with SNMP support.
The vendor was notified on September 15, 2004.
The original advisory is available at:
http://www.idefense.com/application/poi/display?id=152&type=vulnerabilities
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Impact:
A remote user can cause the proxy services to restart.
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Solution:
Red Hat has released a fix.
Red Hat Enterprise Linux AS (Advanced Server) version 2.1:
SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/squid-2.4.STABLE7-1.21as.src.rpm
d6f19557d67672e3f08e2ef191c74ba2 squid-2.4.STABLE7-1.21as.src.rpm
i386:
656bb40dacbfda418bc5b0b0a2afb9ca squid-2.4.STABLE7-1.21as.i386.rpm
ia64:
4c7f9233d5c07161815cd0f238598ad9 squid-2.4.STABLE7-1.21as.ia64.rpm
Red Hat Linux Advanced Workstation 2.1:
SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/squid-2.4.STABLE7-1.21as.src.rpm
d6f19557d67672e3f08e2ef191c74ba2 squid-2.4.STABLE7-1.21as.src.rpm
ia64:
4c7f9233d5c07161815cd0f238598ad9 squid-2.4.STABLE7-1.21as.ia64.rpm
Red Hat Enterprise Linux ES version 2.1:
SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/squid-2.4.STABLE7-1.21as.src.rpm
d6f19557d67672e3f08e2ef191c74ba2 squid-2.4.STABLE7-1.21as.src.rpm
i386:
656bb40dacbfda418bc5b0b0a2afb9ca squid-2.4.STABLE7-1.21as.i386.rpm
Red Hat Enterprise Linux AS version 3:
SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/squid-2.5.STABLE3-6.3E.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
ia64:
b47592e7fc983dcef36e7949bc603014 squid-2.5.STABLE3-6.3E.2.ia64.rpm
ppc:
73cc5efea1bad51e51858f2e56ea1581 squid-2.5.STABLE3-6.3E.2.ppc.rpm
s390:
d42bd6385028a6336b62acd9e1d3b551 squid-2.5.STABLE3-6.3E.2.s390.rpm
s390x:
c9cbce5de6662b4cc156dce76829bfe1 squid-2.5.STABLE3-6.3E.2.s390x.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.2.x86_64.rpm
Red Hat Desktop version 3:
SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/squid-2.5.STABLE3-6.3E.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.2.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.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
ia64:
b47592e7fc983dcef36e7949bc603014 squid-2.5.STABLE3-6.3E.2.ia64.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.2.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.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
ia64:
b47592e7fc983dcef36e7949bc603014 squid-2.5.STABLE3-6.3E.2.ia64.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.2.x86_64.rpm
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Vendor URL: www.squid-cache.org/ (Links to External Site)
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Cause:
Exception handling error, Input validation error
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Underlying OS:
Linux (Red Hat Enterprise)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 20 Oct 2004 15:47 -0400
Subject: [RHSA-2004:591-01] Updated squid package fixes vulnerability
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- ---------------------------------------------------------------------
Red Hat Security Advisory
Synopsis: Updated squid package fixes vulnerability
Advisory ID: RHSA-2004:591-01
Issue date: 2004-10-20
Updated on: 2004-10-20
Product: Red Hat Enterprise Linux
Obsoletes: RHSA-2004:462
CVE Names: CAN-2004-0918
- ---------------------------------------------------------------------
1. Summary:
An updated squid package that fixes a remote denial of service vulnerability
is now avaliable.
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
3. Problem description:
Squid is a full-featured Web proxy cache.
iDEFENSE reported a flaw in the squid SNMP module. This flaw could allow
an attacker who has the ability to send arbitrary packets to the SNMP port
to restart the server, causing it to drop all open connections. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0918 to this issue.
All users of squid should update to this erratum package, which contains a
backport of the security fix for this vulnerability.
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/ for more info):
135319 - CAN-2004-0918 SNMP DoS
6. RPMs required:
Red Hat Enterprise Linux AS (Advanced Server) version 2.1:
SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/squid-2.4.STABLE7-1.21as.src.rpm
d6f19557d67672e3f08e2ef191c74ba2 squid-2.4.STABLE7-1.21as.src.rpm
i386:
656bb40dacbfda418bc5b0b0a2afb9ca squid-2.4.STABLE7-1.21as.i386.rpm
ia64:
4c7f9233d5c07161815cd0f238598ad9 squid-2.4.STABLE7-1.21as.ia64.rpm
Red Hat Linux Advanced Workstation 2.1:
SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/squid-2.4.STABLE7-1.21as.src.rpm
d6f19557d67672e3f08e2ef191c74ba2 squid-2.4.STABLE7-1.21as.src.rpm
ia64:
4c7f9233d5c07161815cd0f238598ad9 squid-2.4.STABLE7-1.21as.ia64.rpm
Red Hat Enterprise Linux ES version 2.1:
SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/squid-2.4.STABLE7-1.21as.src.rpm
d6f19557d67672e3f08e2ef191c74ba2 squid-2.4.STABLE7-1.21as.src.rpm
i386:
656bb40dacbfda418bc5b0b0a2afb9ca squid-2.4.STABLE7-1.21as.i386.rpm
Red Hat Enterprise Linux AS version 3:
SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/squid-2.5.STABLE3-6.3E.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
ia64:
b47592e7fc983dcef36e7949bc603014 squid-2.5.STABLE3-6.3E.2.ia64.rpm
ppc:
73cc5efea1bad51e51858f2e56ea1581 squid-2.5.STABLE3-6.3E.2.ppc.rpm
s390:
d42bd6385028a6336b62acd9e1d3b551 squid-2.5.STABLE3-6.3E.2.s390.rpm
s390x:
c9cbce5de6662b4cc156dce76829bfe1 squid-2.5.STABLE3-6.3E.2.s390x.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.2.x86_64.rpm
Red Hat Desktop version 3:
SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/squid-2.5.STABLE3-6.3E.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.2.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.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
ia64:
b47592e7fc983dcef36e7949bc603014 squid-2.5.STABLE3-6.3E.2.ia64.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.2.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.2.src.rpm
919b9823a67f83efafc8e34dd7b54a76 squid-2.5.STABLE3-6.3E.2.src.rpm
i386:
1e97031b4ab8ed0095aed15fc8023f57 squid-2.5.STABLE3-6.3E.2.i386.rpm
ia64:
b47592e7fc983dcef36e7949bc603014 squid-2.5.STABLE3-6.3E.2.ia64.rpm
x86_64:
50f854496bd475854ef578891dc5d630 squid-2.5.STABLE3-6.3E.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://www.redhat.com/security/team/key.html#package
7. References:
http://www.idefense.com/application/poi/display?id=152&type=vulnerabilities
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0918
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://www.redhat.com/security/team/contact.html
Copyright 2004 Red Hat, Inc.
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