PT-2022-6173 · Cisco · Cisco Ios Xe+1

Published 2022-09-28 · Updated 2025-10-14 · CVE-2022-20920

Positive Technologies (AI Summary)

CVSS v3.1

7.7

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

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

Description A vulnerability in the SSH implementation could allow an authenticated, remote attacker to cause an affected device to reload. This issue is due to improper handling of resources during an exceptional situation. An attacker could exploit this by continuously connecting to an affected device and sending specific SSH requests, potentially causing the device to reload.

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

DoS

Improper Handling of Exceptional Conditions

Weakness Enumeration

CWE-755

Related Identifiers

BDU:2023-00303

CVE-2022-20920

Affected Products

Cisco Ios

Cisco Ios Xe

References · 8

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-excpt-dos-FzOBQTnk · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-20920 · Security Note
• https://osv.dev/vulnerability/CVE-2022-20920 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00303 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-excpt-dos-FzOBQTnk · Vendor Advisory
• https://t.me/cveNotify/130549 · Telegram Post
• https://t.me/cibsecurity/51076 · Telegram Post
• https://t.me/cvenotify/73118 · Telegram Post