Vulnerability identifier: #VU51765

Vulnerability risk: Low

CVSSv3.1: 4.5 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1391

CWE-ID: CWE-489

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco Embedded Services 3300 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Catalyst IE3200 Rugged Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Catalyst IE3300 Rugged Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Catalyst IE3400 Rugged Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Catalyst IE3400 Heavy Duty Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco IOS XE
Operating systems & Components / Operating system
Cisco IOS
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to the presence of development testing and verification scripts that remained on the device in the dragonite debugger. A local administrator can bypass the consent token mechanism with the residual scripts on the affected device and escalate from privilege level 15 to root privilege.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Embedded Services 3300 Series Switches: All versions

Cisco Catalyst IE3200 Rugged Series: All versions

Cisco Catalyst IE3300 Rugged Series: All versions

Cisco Catalyst IE3400 Rugged Series: All versions

Cisco Catalyst IE3400 Heavy Duty Series: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-FSM-Yj8qJbJc

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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.

Is there known malware, which exploits this vulnerability?

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