-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
________________________________________________________________________
OpenPKG Security Advisory The OpenPKG Project
http://www.openpkg.org/security.html http://www.openpkg.org
openpkg-security@openpkg.org openpkg@openpkg.org
OpenPKG-SA-2004.048 29-Oct-2004
________________________________________________________________________
Package: squid (option "with_snmp yes" only)
Vulnerability: denial of service
OpenPKG Specific: no
Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= squid-2.5.6-20040913 >= squid-2.5.7-20041012
OpenPKG 2.2 none N.A.
OpenPKG 2.1 <= squid-2.5.6-2.1.0 >= squid-2.5.6-2.1.1
Dependent Packages: none
Description:
According to an iDEFENSE security advisory [0], a denial of service
(DoS) vulnerability exists in the Squid [1] web caching proxy [1].
The "asn_parse_header" function in the SNMP module of Squid before
version 2.4.STABLE7 allows remote attackers to cause a denial of
service (server restart) via certain SNMP packets with negative
length fields that causes a memory allocation error. The Common
Vulnerabilities and Exposures (CVE) project assigned the id
CAN-2004-0918 [2] to the problem.
Please check whether you are affected by running "<prefix>/bin/rpm -q
squid" and "<prefix>/bin/rpm -qi squid | grep with_snmp". If you have
the "squid" package with option "with_snmp" installed and its version
is affected (see above), we recommend that you immediately upgrade
(see Solution) [3][4].
Solution:
Select the updated source RPM appropriate for your OpenPKG release
[5], fetch it from the OpenPKG FTP service [6] or a mirror location,
verify its integrity [7], build a corresponding binary RPM from it [3]
and update your OpenPKG installation by applying the binary RPM [4].
For the previous release OpenPKG 2.1, perform the following operations
to permanently fix the security problem (for other releases adjust
accordingly).
$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/2.1/UPD
ftp> get squid-2.5.6-2.1.1.src.rpm
ftp> bye
$ <prefix>/bin/openpkg rpm -v --checksig squid-2.5.6-2.1.1.src.rpm
$ <prefix>/bin/openpkg rpm --rebuild squid-2.5.6-2.1.1.src.rpm
$ su -
# <prefix>/bin/openpkg rpm -Fvh <prefix>/RPM/PKG/squid-2.5.6-2.1.1.*.rpm
________________________________________________________________________
References:
[0] http://www.idefense.com/application/poi/display?id=152
[1] http://www.squid-cache.org/
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0918
[3] http://www.openpkg.org/tutorial.html#regular-source
[4] http://www.openpkg.org/tutorial.html#regular-binary
[5] ftp://ftp.openpkg.org/release/2.1/UPD/squid-2.5.6-2.1.1.src.rpm
[6] ftp://ftp.openpkg.org/release/2.1/UPD/
[7] http://www.openpkg.org/security.html#signature
________________________________________________________________________
For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from http://pgp.openpkg.org and
hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org/
for details on how to verify the integrity of this advisory.
________________________________________________________________________
-----BEGIN PGP SIGNATURE-----
Comment: OpenPKG <openpkg@openpkg.org>
iD8DBQFBgllNgHWT4GPEy58RAuOuAJ0aemAHXPo9pTKgOh8OtW/J/xihYwCfdW01
zpDwYACYJT+WD2p+gJDCwmY=
=GmCs
-----END PGP SIGNATURE-----
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html
