Buffer overflow in Cisco Systems, Inc products - CVE-2021-1451
Published: March 30, 2021
Vulnerability identifier: #VU51779
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1451
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the Easy Virtual Switching System (VSS) feature. A remote attacker can send specially crafted Easy VSS protocol packets to UDP port 5500, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Cisco Catalyst 4500 Series
Cisco Catalyst 4500-X Series
Cisco IOS XE
Cisco Catalyst 4500-X Series
Cisco IOS XE
How to mitigate CVE-2021-1451
Install updates from vendor's website.
Cisco IOS XE - addressed in versions 15.2.7 E4, 15.2.7.1.0p E4