Denial of service in Cisco IOS and IOS XE Software
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-20920 |
| CWE-ID | CWE-755 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco IOS XE Operating systems & Components / Operating system Cisco IOS Operating systems & Components / Operating system |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper Handling of Exceptional Conditions
EUVDB-ID: #VU67728
Risk: Medium
CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2022-20920
CWE-ID:
CWE-755 - Improper Handling of Exceptional Conditions
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of resources during an exceptional situation in the SSH implementation. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco IOS XE: 15.7(03)M03
Cisco IOS: 15.7(03)M03
CPE2.3- cpe:2.3:o:cisco_systems:cisco_ios_xe:15.7(03)M03:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios:15.7(03)M03:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
