Buffer overflow in Cisco Systems, Inc products - CVE-2021-1273
Published: January 20, 2021 / Updated: January 26, 2021
Vulnerability identifier: #VU50012
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2021-1273
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the bounds checking in the forwarding plane of the IPSec tunnel management functionality. A remote attacker can send specially crafted IPv4 or IPv6 packets, trigger memory corruption and cause a denial of service condition on the target system.
Affected software
Cisco SD-WAN vBond Orchestrator
Cisco SD-WAN vEdge Cloud Router
Cisco SD-WAN vEdge Routers
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
Catalyst SD-WAN Controller (formerly SD-WAN vSmart)
Cisco SD-WAN
Cisco SD-WAN vEdge Cloud Router
Cisco SD-WAN vEdge Routers
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
Catalyst SD-WAN Controller (formerly SD-WAN vSmart)
Cisco SD-WAN
How to mitigate CVE-2021-1273
Install updates from vendor's website.
Cisco SD-WAN - addressed in versions 18.4.6, 20.1.2, 20.3.1, 20.3.2, 20.4.1