CVE-2015-3240

mediumpriority · track · 18EPSS 0.028 · 86 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.79% (86th) EPSS

CVSS 4.3 · medium

Is it mine?

18 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-28

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedlibreswan-0:3.15-5.ael7b_1.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.ael7b_1.src as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.src as a component of Red Hat Enterprise Linux Client (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.src as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.src as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Client (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-debuginfo-0:3.15-5.ael7b_1.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-debuginfo-0:3.15-5.el7_1.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-debuginfo-0:3.15-5.el7_1.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-debuginfo-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Client (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-debuginfo-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979
Fixedlibreswan-debuginfo-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:1979

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–5

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.03.7lowAV:N/AC:M/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Psecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-189USprimaryCWE-617US

affected products (18)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
libreswan libreswan= 3.14nvdUScpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*
libreswan-0:3.15-5.ael7b_1.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.ael7b_1.src as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.s390x as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.src as a component of Red Hat Enterprise Linux Client (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.src as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.src as a component of Red Hat Enterprise Linux Workstation (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Client (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:3.15-5.ael7b_1.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:3.15-5.el7_1.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:3.15-5.el7_1.s390x as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Client (v. 7)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)all versionsfixedredhat_csafUS
libreswan-debuginfo-0:3.15-5.el7_1.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)all versionsfixedredhat_csafUS

advisories (1)

Vendor and ecosystem advisories describing this.

RHSA-2015:1979Red Hat Security Advisory: libreswan security and enhancement update2015-11-04csaf · redhat_csafUS
Updated libreswan packages that fix one security issue, several bugs, and add several enhancements are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd redhat_csaf NVD CVE.org MITRE

published 2015-11-09modified 2026-06-17

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+1337 more

references (25)

External citations — patches, advisories, analysis.

scry

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