drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Denial of Service in Openswan und IPsec-Tools
Name: |
Denial of Service in Openswan und IPsec-Tools |
|
ID: |
200512-04 |
|
Distribution: |
Gentoo |
|
Plattformen: |
Keine Angabe |
|
Datum: |
Mo, 12. Dezember 2005, 15:45 |
|
Referenzen: |
http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3732
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3671 |
|
Applikationen: |
Openswan, IPsec-Tools |
|
Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig5DE3239F4FFEA828552E09C7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200512-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: Openswan, IPsec-Tools: Vulnerabilities in ISAKMP Protocol implementation Date: December 12, 2005 Bugs: #112568, #113201 ID: 200512-04
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis ========
Openswan and IPsec-Tools suffer from an implementation flaw which may allow a Denial of Service attack.
Background ==========
Openswan is an implementation of IPsec for Linux. IPsec-Tools is a port of KAME's implementation of the IPsec utilities, including racoon, an Internet Key Exchange daemon. Internet Key Exchange version 1 (IKEv1), a derivate of ISAKMP, is an important part of IPsec. IPsec is widely used to secure exchange of packets at the IP layer and mostly used to implement Virtual Private Networks (VPNs).
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/openswan < 2.4.4 >= 2.4.4 2 net-firewall/ipsec-tools < 0.6.3 >= 0.6.3 *>= 0.6.2-r1 *>= 0.4-r2 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. -------------------------------------------------------------------
Description ===========
The Oulu University Secure Programming Group (OUSPG) discovered that various ISAKMP implementations, including Openswan and racoon (included in the IPsec-Tools package), behave in an anomalous way when they receive and handle ISAKMP Phase 1 packets with invalid or abnormal contents.
Impact ======
A remote attacker can create a specially crafted packet using 3DES with an invalid key length, resulting in a Denial of Service attack, format string vulnerabilities or buffer overflows.
Workaround ==========
Avoid using "aggressive mode" in ISAKMP Phase 1, which exchanges information between the sides before there is a secure channel.
Resolution ==========
All Openswan users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/openswan-2.4.4"
All IPsec-Tools users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose net-firewall/ipsec-tools
References ==========
[ 1 ] CVE-2005-3671 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3671 [ 2 ] CVE-2005-3732 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3732 [ 3 ] Original Advisory http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200512-04.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2005 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
--------------enig5DE3239F4FFEA828552E09C7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFDnYw8vcL1obalX08RAmtcAKCZ1lDpc4sT84w0LNChIORk0W9RBgCfSIL8 taBNklBpjKQwvZjnSKHOf38= =EoGw -----END PGP SIGNATURE-----
--------------enig5DE3239F4FFEA828552E09C7-- -- gentoo-announce@gentoo.org mailing list
|
|
|
|