#VU76263 Heap-based buffer overflow in Cisco Systems, Inc products - CVE-2023-20156

Vulnerability identifier: #VU76263

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2023-20156

CWE-ID: CWE-122

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Cisco Small Business 200 Series Smart Switches
Cisco Small Business 300 Series Managed Switches
Cisco Small Business 500 Series Stackable Managed Switches
Cisco 250 Series Smart Switches
Cisco 350 Series Managed Switches
Cisco 350X Series Stackable Managed Switches
Cisco 550X Series Stackable Managed Switches

Software vendor:
Cisco Systems, Inc

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

The vulnerability exists due to a boundary error when processing requests sent to the web interface. A remote non-authenticated attacker can send a specially crafted request to the web interface, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg-web-multi-S9g4Nkgv
• https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwe27393
• https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwe32313