PT-2022-6391 · Cisco · Cisco Ios Xe

Published 2022-09-28 · Updated 2022-10-13 · CVE-2022-20915

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 implementation of IPv6 VPN over MPLS (6VPE) with Zone-Based Firewall (ZBFW) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This is due to improper error handling of an IPv6 packet that is forwarded from an MPLS and ZBFW-enabled interface in a 6VPE deployment. An attacker could exploit this by sending a crafted IPv6 packet sourced from a device on the IPv6-enabled virtual routing and forwarding (VRF) interface through the affected device, potentially allowing the attacker to reload the device and resulting in a 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-436

CWE-115

Related Identifiers

BDU:2023-01146

CVE-2022-20915

Affected Products

Cisco Ios Xe

References · 5

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-6vpe-dos-tJBtf5Zv · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-20915 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-6vpe-dos-tJBtf5Zv · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-01146 · Security Note
• https://t.me/cibsecurity/51078 · Telegram Post