CVE-2016-5361

Description

programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed UDP packet. NOTE: the original behavior complies with the IKEv1 protocol, but has a required security update from the libreswan vendor; as of 2016-06-10, it is expected that several other IKEv1 implementations will have vendor-required security updates, with separate CVE IDs assigned to each.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.02% Top 25%
Vendor Advisory redhat.com Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.libreswan.org/pipermail/swan-dev/2016-March/001394.html mailing list
http://rhn.redhat.com/errata/RHSA-2016-2603.html vendor advisory
https://github.com/libreswan/libreswan/commit/152d6d95632d8b9477c170f1de99bcd86d7fb1d6 patch vendor advisory
http://www.openwall.com/lists/oss-security/2016/06/10/4 mailing list

Frequently Asked Questions

What is the severity of CVE-2016-5361?
CVE-2016-5361 has been scored as a high severity vulnerability.
How to fix CVE-2016-5361?
To fix CVE-2016-5361, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-5361 being actively exploited in the wild?
It is possible that CVE-2016-5361 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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