Vulnerability identifier: #VU76268

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-20161

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Small Business 200 Series Smart Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business 300 Series Managed Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business 500 Series Stackable Managed Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 250 Series Smart Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 350 Series Managed Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 350X Series Stackable Managed Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 550X Series Stackable Managed Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when handling requests. A remote unauthenticated attacker can send specially crafted input to the web interface, trigger a stack-based buffer overflow and execute arbitrary code with root privileges on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Small Business 200 Series Smart Switches: All versions

Cisco Small Business 300 Series Managed Switches: All versions

Cisco Small Business 500 Series Stackable Managed Switches: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg-web-multi-S9g4Nkgv
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCwe27444
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCwe32334

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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.