Privilege escalation in IOS XE SD-WAN Software

1) OS Command Injection

EUVDB-ID: #VU51719

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1382

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper input validation in certain CLI commands in Cisco IOS XE SD-WAN Software. A local uprivileged user can execute arbitrary OS commands on the target system with root privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco SD-WAN: 17.3.2

Cisco IOS XE SD-WAN: 17.3.2

Cisco IOS XE: 17.2.1 - 17.2.1EFT

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xesdwcinj-t68PPW7m
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw64828

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.