Vulnerabilities > CVE-2018-0476 - Unspecified vulnerability in Cisco IOS XE 15.5(3)S5.1/15.5(3)S6.1/16.6.2
Attack vector
NETWORK Attack complexity
HIGH Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
A vulnerability in the Network Address Translation (NAT) Session Initiation Protocol (SIP) Application Layer Gateway (ALG) of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to improper processing of SIP packets in transit while NAT is performed on an affected device. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted SIP packets via UDP port 5060 through an affected device that is performing NAT for SIP packets. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 3 |
Nessus
| NASL family | CISCO |
| NASL id | CISCO-SA-20180926-SIP-ALG.NASL |
| description | According to its self-reported version, the IOS XE is affected by one or more vulnerabilities. Please see the included Cisco BIDs and the Cisco Security Advisory for more information. |
| last seen | 2020-04-30 |
| modified | 2018-10-05 |
| plugin id | 117954 |
| published | 2018-10-05 |
| reporter | This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/117954 |
| title | Cisco IOS XE Software NAT SIP Application Layer Gateway DoS Vulnerability (cisco-sa-20180926-sip-alg) |