Link following in Cisco Systems, Inc products - CVE-2021-1278
Published: January 20, 2021 / Updated: January 26, 2021
Vulnerability identifier: #VU50014
CSH Severity: Low
CVSS v4: 5.2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1278
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to the absence of validation checks for the input that is used to create symlinks. A local user can create a symlink to a target file on a specific path 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-2021-1278
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