SB2015110912 - Input validation error in libreswan
Published: November 9, 2015 Updated: August 9, 2020
Security Bulletin ID
SB2015110912
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2015-3240)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The pluto IKE daemon in libreswan before 3.15 and Openswan before 2.6.45, 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.
Remediation
Install update from vendor's website.
References
- http://rhn.redhat.com/errata/RHSA-2015-1979.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securityfocus.com/bid/77536
- http://www.securitytracker.com/id/1033418
- https://libreswan.org/security/CVE-2015-3240/CVE-2015-3240.txt
- https://lists.openswan.org/pipermail/users/2015-August/023401.html
- https://security.gentoo.org/glsa/201603-13