OS Command Injection in Cisco Systems, Inc products - CVE-2021-1432

Vulnerability identifier: #VU51784

CSH Severity: Low

CVSS v4: 7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-1432

CWE-ID: CWE-78

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the CLI. A local user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Cisco 1000 Series Integrated Services Routers
4000 Series Integrated Services Routers
Cisco ASR 1000 Series Aggregation Services Routers
Cloud Services Router 1000V Series
Cisco IOS XE SD-WAN

Install updates from vendor's website.

Cisco IOS XE SD-WAN - addressed in versions 16.8.1, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.1a, 16.8.1 b, 16.8.2, 16.8.3, 16.9.1, 16.9.1c, 16.9.1d, 16.9.1s, 16.9.1a, 16.9.1 b, 16.9.2, 16.9.2s, 16.9.2a, 16.9.3, 16.9.3h, 16.9.3s, 16.9.3a, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.7, 16.10.1, 16.10.1c, 16.10.1d, 16.10.1e, 16.10.1f, 16.10.1g, 16.10.1i, 16.10.1s, 16.10.1a, 16.10.1 b, 16.10.2, 16.10.3, 16.12.4.43, 16.12.5, 16.12.5a, 17.2.1.64, 17.2.2, 17.3.0.213, 17.3.1, 17.3.1w, 17.3.1x, 17.3.1a, 17.3.1.9, 17.3.2, 17.3.2a, 17.3.3, 17.4.0.62, 17.4.0.65, 17.4.1, 17.4.1a, 17.4.1 b

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-sdwarbcmdexec-sspOMUr3

• OS Command Injection in Cisco IOS XE SD-WAN Software