Privilege escalation in Cisco IOS XE SD-WAN Software

1) Improper Privilege Management

EUVDB-ID: #VU51734

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1371

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper privilege management within the role-based access control of Cisco IOS XE SD-WAN Software. A local user with read-only privileges can obtain administrative privileges by using the console port when the device is in the default SD-WAN configuration.

Successful exploitation of the vulnerability may allow a user with read-only permissions to access administrative privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco ASR 1000 Series Aggregation Services Routers: All versions

Cisco Cloud Services Router 1000V Series: All versions

Cisco 4000 Series Integrated Services Routers: All versions

Cisco 1000 Series Integrated Services Routers: All versions

Cisco IOS XE: 17.2.1r - 17.2.1v

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-esc-rSNVvTf9
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv43400

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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