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

medium Nessus Plugin ID 90355
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Synopsis

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

Description

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.

Solution

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

See Also

http://www.nessus.org/u?9feec3b3

https://www.tenable.com/security/research/tra-2016-06

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

Dependencies: cisco_ios_version.nasl

Risk Information

CVSS Score Source: CVE-2016-1344

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

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: 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