High severity · published Oct 10, 2022
CVE-2022-20920
Cisco IOS and IOS XE Software SSH Denial of Service Vulnerability
7.7
CVSS
1%
EPSS
No
On KEV
Description
A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to improper handling of resources during an exceptional situation. An attacker could exploit this vulnerability by continuously connecting to an affected device and sending specific SSH requests. A successful exploit could allow the attacker to cause the affected device to reload.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IX
IOS XE · Cisco
3.2.0se; 3.2.1se; 3.2.2se; 3.2.3se; 3.2se; 3.3.0se; +34 more · source: NVD
CI
Cisco IOS · Cisco
All versions, or not specified · source: vendor
IO
Ios · Cisco
12.2(6)i1; 12.2(58)ex; 12.2(58)ey; 12.2(58)ey1; 12.2(58)ey2; 12.2(58)ez; +34 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-20920
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-20920
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-excpt-dos-FzOBQTnk
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