Vulnerability identifier: #VU56836

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1619

CWE-ID: CWE-824

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco IOS XE
Operating systems & Components / Operating system
Cisco Catalyst 4000 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 2800 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to an uninitialized pointer in the authentication, authorization, and accounting (AAA) function. A remote attacker can send a series of NETCONF or RESTCONF requests and use NETCONF or RESTCONF to install, manipulate, or delete the configuration of a network device

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XE: 16.12.3 - 17.3.1

Cisco Catalyst 4000 Series Switches: All versions

Cisco 2800 Series Integrated Services Routers: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aaa-Yx47ZT8Q

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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