Cisco IOS IKEv2 Fragmentation DoS (cisco-sa-20160323-ios-ikev2)

medium Nessus Plugin ID 90355


The remote device is missing a vendor-supplied security patch.


According to its self-reported version, the Cisco IOS software running on the remote device is affected by a denial of service vulnerability in the Internet Key Exchange version 2 (IKEv2) subsystem due to improper handling of fragmented IKEv2 packets. An unauthenticated, remote attacker can exploit this issue, via specially crafted UDP packets, to cause the device to reload.

Note that this issue only affects devices with IKEv2 fragmentation enabled and is configured for any VPN type based on IKEv2.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCux38417. Alternatively, apply the workaround as referenced in the vendor advisory.

See Also

Plugin Details

Severity: Medium

ID: 90355

File Name: cisco-sa-20160323-ikev2-ios.nasl

Version: 1.12

Type: combined

Family: CISCO

Published: 4/6/2016

Updated: 11/20/2019

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2016-1344


Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/23/2016

Vulnerability Publication Date: 3/23/2016

Reference Information

CVE: CVE-2016-1344