PT-2018-2102 · Cisco · Cisco Ios Xe

Published 2018-09-26 · Updated 2019-10-09 · CVE-2018-0476

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Cisco IOS XE Software (affected versions not specified)

Description A vulnerability in the Network Address Translation (NAT) Session Initiation Protocol (SIP) Application Layer Gateway (ALG) 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 issue 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Weakness Enumeration

CWE-399

Related Identifiers

BDU:2019-00053

CVE-2018-0476

Affected Products

Cisco Ios Xe

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2018-0476 · Security Note
• https://osv.dev/vulnerability/CVE-2018-0476 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-sip-alg · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-00053 · Security Note
• http://securitytracker.com/id/1041734 · Note
• http://securitytracker.com/id/1041737 · Note
• http://securityfocus.com/bid/105419 · Note
• https://securityfocus.com/bid/105419/info · Note