Vulnerability identifier: #VU62335

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20726

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
800 Series Industrial Integrated Services Routers
Other software / Other software solutions
Industrial Ethernet 4000 Series Switches
Other software / Other software solutions
800 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 1000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
4000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco ASR 1000 Series Aggregation Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 9x00 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst IE3400 Rugged Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Embedded Services 3300 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
IR510 WPAN Industrial Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
IC3000 Industrial Compute Gateway
Hardware solutions / Routers & switches, VoIP, GSM, etc
CGR1000 Compute Modules
Hardware solutions / Firmware
Cisco IOx
Hardware solutions / Firmware
Cisco IOS XE
Operating systems & Components / Operating system
Cisco IOS
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient error handling of socket operations in the Cisco IOx application hosting environment. A remote attacker can send a specially crafted TCP traffic and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

800 Series Industrial Integrated Services Routers: All versions

800 Series Integrated Services Routers: All versions

CGR1000 Compute Modules: All versions

Industrial Ethernet 4000 Series Switches: All versions

Cisco 1000 Series Integrated Services Routers: All versions

4000 Series Integrated Services Routers: All versions

Cisco ASR 1000 Series Aggregation Services Routers: All versions

Catalyst 9x00 Series Switches: All versions

Catalyst IE3400 Rugged Series: All versions

Embedded Services 3300 Series Switches: All versions

IR510 WPAN Industrial Routers: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-yuXQ6hFj

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.