CVE-2018-0476

published 2018-10-05

CVE-2018-0476: A vulnerability in the Network Address Translation (NAT) Session Initiation Protocol (SIP) Application Layer Gateway (ALG) of Cisco IOS XE Software could allow…

Priority P3 38 medium 5.9 CVSS 3.0

AV N AC H PR N UI N S U C N I N A H

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.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_ios_xe_software	—	—
cisco	ios_xe	—	—
cisco	ios_xe	—	—
cisco	ios_xe	—	—
cisco	ios_xe	—	—

CVSS provenance

nvd v3.0 5.9 MEDIUM CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd v2.0 7.1 HIGH AV:N/AC:M/Au:N/C:N/I:N/A:C

vendor_cisco 8.6 HIGH

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