GLSA Bodhisattva
Joined: 23 Sep 2003 Posts: 7221 Location: Sat in front of my computer
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Posted: Mon Dec 12, 2005 8:53 pm Post subject: [ GLSA 200512-04 ] Openswan, IPsec-Tools: Vulnerabilities in |
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Gentoo Linux Security Advisory
Title: Openswan, IPsec-Tools: Vulnerabilities in ISAKMP Protocol implementation (GLSA 200512-04)
Severity: low
Exploitable: remote
Date: December 12, 2005
Updated: December 14, 2005
Bug(s): #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: net-misc/openswan
Vulnerable: < 2.4.4
Unaffected: >= 2.4.4
Architectures: All supported architectures
Package: net-firewall/ipsec-tools
Vulnerable: < 0.6.3
Unaffected: >= 0.6.3
Unaffected: >= 0.6.2-r1 < 0.6.3
Unaffected: >= 0.4-r2 < 0.5
Architectures: All 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 could craft specific packets that would result in a Denial of Service attack, if Openswan and racoon are used in specific, weak configurations.
Workaround
There is no known workaround at this time.
Resolution
All Openswan users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openswan-2.4.4" | All IPsec-Tools users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose net-firewall/ipsec-tools |
References
CVE-2005-3671
CVE-2005-3732
Original Advisory
Last edited by GLSA on Wed May 24, 2006 4:18 am; edited 3 times in total |
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