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Joined: 12 May 2004
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PostPosted: Sun Mar 13, 2016 12:26 am    Post subject: [ GLSA 201603-13 ] Libreswan Reply with quote

Gentoo Linux Security Advisory

Title: Libreswan: Multiple Vulnerabilities (GLSA 201603-13)
Severity: normal
Exploitable: remote
Date: March 12, 2016
Bug(s): #550974, #558692
ID: 201603-13


Multiple vulnerabilities have been found in libreSwan possibly
resulting in Denial of Service.


Libreswan is a free software implementation of the most widely supported
and standarized VPN protocol based on (“IPsec”) and the Internet Key
Exchange (“IKE”).

Affected Packages

Package: net-misc/libreswan
Vulnerable: < 3.15
Unaffected: >= 3.15
Architectures: All supported architectures


The pluto IKE daemon in Libreswan, when built with NSS, allows remote
attackers to cause a Denial of Service (assertion failure and daemon
restart) via a zero DH g^x value in a KE payload in a IKE packet.
Additionally, remote attackers could cause a Denial of Service (daemon
restart) via an IKEv1 packet with (1) unassigned bits set in the IPSEC
DOI value or (2) the next payload value set to ISAKMP_NEXT_SAK.


Remote attackers could possibly cause Denial of Service.


There is no known workaround at this time.


All Libreswan users should upgrade to the latest version:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=net-misc/libreswan-3.15"


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