Cisco IOS Software IKEv1 State Machine DoS (CSCuw08236)

medium Nessus Plugin ID 87820

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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 1 (IKEv1) subsystem due to insufficient condition checks in the IKEv1 state machine. An unauthenticated, remote attacker can exploit this vulnerability, by sending a spoofed, specific IKEv1 packet to an endpoint of an IPsec tunnel, to tear down IPsec tunnels that terminate on the endpoint, resulting in a partial denial of service condition.

Solution

Apply the relevant patch referenced in Cisco security advisory cisco-sa-20151218-ios.

Plugin Details

Severity: Medium

ID: 87820

File Name: cisco-sn-CSCuw08236-ios.nasl

Version: 1.12

Type: combined

Family: CISCO

Published: 1/8/2016

Updated: 12/1/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2015-6429

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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: 12/18/2015

Vulnerability Publication Date: 12/18/2015

Reference Information

CVE: CVE-2015-6429

BID: 79745

CISCO-SA: cisco-sa-20151218-ios

CISCO-BUG-ID: CSCuw08236

Detections

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