CVE-2015-3240
The pluto IKE daemon in libreswan before 3.15 and Openswan before 2.6.45, when built with NSS,...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2015-3240- CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-189
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2015-3240- Updated
- 2026-11-02
EUVDEUVD-2015-3296 No score
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.
- Record
EUVD-2015-3296- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m56r-f6p2-qgw5 No score
The pluto IKE daemon in libreswan before 3.15 and Openswan before 2.6.45, when built with NSS,...
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.
- Record
GHSA-m56r-f6p2-qgw5- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libreswanRed Hat:enterprise_linux:7::client |
before 0:3.15-5.el7_1 | 0:3.15-5.el7_1 |
libreswan-debuginfoRed Hat:enterprise_linux:7::client |
before 0:3.15-5.el7_1 | 0:3.15-5.el7_1 |
libreswanRed Hat:enterprise_linux:7::server |
before 0:3.15-5.ael7b_1 | 0:3.15-5.ael7b_1 |
libreswan-debuginfoRed Hat:enterprise_linux:7::server |
before 0:3.15-5.ael7b_1 | 0:3.15-5.ael7b_1 |
libreswanRed Hat:enterprise_linux:7::workstation |
before 0:3.15-5.el7_1 | 0:3.15-5.el7_1 |
libreswan-debuginfoRed Hat:enterprise_linux:7::workstation |
before 0:3.15-5.el7_1 | 0:3.15-5.el7_1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2015-3240 is a medium vulnerability (CVSS 4.3) in Libreswan, published November 9, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.79%, the 86th percentile. Fixed in libreswan 0:3.15-5.el7_1.
References
rhn.redhat.com/errata/RHSA-2015-1979.html
securitytracker.com/id/1033418
securityfocus.com/bid/77536
oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
security.gentoo.org/glsa/201603-13
libreswan.org/security/CVE-2015-3240/CVE-2015-3240.txt
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lists.openswan.org/pipermail/users/2015-August/023401.html
nvd.nist.gov/vuln/detail/CVE-2015-3240
access.redhat.com/errata/RHSA-2015:1979
bugzilla.redhat.com/show_bug.cgi?id=1232320
github.com/advisories/GHSA-m56r-f6p2-qgw5
security.access.redhat.com/data/csaf/v2/advisories/2015/rhsa-2015_1979.json
cve.org/CVERecord?id=CVE-2015-3240