PT-2016-6390 · Libreswan+2 · Libreswan+2

Published 2016-06-16 · Updated 2017-01-18 · CVE-2016-5361

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions libreswan versions prior to 3.17

Description The issue allows remote attackers to cause a denial of service, specifically traffic amplification, via a spoofed UDP packet. This is due to the retransmission in initial-responder states. The original behavior complies with the IKEv1 protocol but has a required security update from the libreswan vendor.

Recommendations For versions prior to 3.17, update to version 3.17 or later to resolve the issue. As a temporary workaround, consider restricting access to the affected ikev1.c module to minimize the risk of exploitation.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CESA-2016_2603

CVE-2016-5361

RHSA-2016:2603

RHSA-2016_2603

Affected Products

Centos

Red Hat

Libreswan

References · 7

• https://github.com/libreswan/libreswan/commit/152d6d95632d8b9477c170f1de99bcd86d7fb1d6 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-5361 · Vendor Advisory
• http://rhn.redhat.com/errata/RHSA-2016-2603.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2016-2603.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-5361 · Security Note
• https://lists.libreswan.org/pipermail/swan-dev/2016-March/001394.html · Note
• http://openwall.com/lists/oss-security/2016/06/10/4 · Note