Input validation error in libreswan - CVE-2015-3240
Published: November 9, 2015 / Updated: August 9, 2020
Vulnerability identifier: #VU40606
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-3240
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
libreswan
Gentoo Linux
Fedora
libreswan
Gentoo Linux
Fedora
libreswan
How to mitigate CVE-2015-3240
Install update from vendor's website.
libreswan - update to 3.15-1.fc21
External 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