Buffer overflow in Cisco SD-WAN vEdge Routers and Cisco SD-WAN vEdge Cloud Router - CVE-2021-1511
Published: May 6, 2021
Vulnerability identifier: #VU52930
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1511
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in forwarding error correction in Cisco SD-WAN vEdge Software. A remote user authenticated to the device through IPsec can send specially crafted traffic to the system, trigger memory corruption and perform a denial of service (DoS) attack.
Affected software
Cisco SD-WAN vEdge Routers
Cisco SD-WAN vEdge Cloud Router
Cisco SD-WAN vEdge Cloud Router
How to mitigate CVE-2021-1511
Install updates from vendor's website.
Cisco SD-WAN vEdge Routers - addressed in versions 20.4.1, 20.5.1
Cisco SD-WAN vEdge Cloud Router - addressed in versions 20.4.1, 20.5.1
Cisco SD-WAN vEdge Cloud Router - addressed in versions 20.4.1, 20.5.1