Buffer overflow in Cisco Systems, Inc products - CVE-2021-1301

Vulnerability identifier: #VU49899

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-2021-1301

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to a boundary error in the NETCONF subsystem. A remote authenticated attacker can trigger memory corruption and cause a denial of service condition on the target system.

Catalyst SD-WAN Controller (formerly SD-WAN vSmart)
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
Cisco SD-WAN vEdge Routers
Cisco SD-WAN vEdge Cloud Router
Cisco SD-WAN vBond Orchestrator
Cisco IOS XE SD-WAN
Cisco IOS XE
Cisco SD-WAN

Install updates from vendor's website.

Cisco IOS XE SD-WAN - update to 16.12.4
Cisco IOS XE - addressed in versions 17.2.1, 17.2.2, 17.3.1, 17.4.1
Cisco SD-WAN - addressed in versions 18.4.5, 19.2.2, 20.1.1, 20.3.1, 20.3.2, 20.4.1

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-bufovulns-B5NrSHbj

• Multiple vulnerabilities in Cisco SD-WAN, Cisco IOS XE SD-WAN and Cisco IOS XE