CVE-2020-3200

HIGH

Cisco IOS Software - DoS

Title source: llm
STIX 2.1

Description

A vulnerability in the Secure Shell (SSH) server code of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. The vulnerability is due to an internal state not being represented correctly in the SSH state machine, which leads to an unexpected behavior. An attacker could exploit this vulnerability by creating an SSH connection to an affected device and using a specific traffic pattern that causes an error condition within that connection. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Scores

CVSS v3 7.7
EPSS 0.0031
EPSS Percentile 54.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-436 CWE-371
Status published
Products (50)
cisco/ios 12.2\(6\)i1
cisco/ios 12.2\(58\)ex
cisco/ios 12.2\(58\)ey
cisco/ios 12.2\(58\)ey1
cisco/ios 12.2\(58\)ey2
cisco/ios 12.2\(58\)ez
cisco/ios 12.2\(58\)se
cisco/ios 12.2\(58\)se1
cisco/ios 12.2\(58\)se2
cisco/ios 12.2\(60\)ez
... and 40 more
Published Jun 03, 2020
Tracked Since Feb 18, 2026