Out-of-bounds write in Cisco Systems, Inc Hardware solutions

#VU50951 Out-of-bounds write in Cisco Systems, Inc Hardware solutions

Published: 2021-02-25

Vulnerability identifier: #VU50951

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1368

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: No

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the Unidirectional Link Detection (UDLD) feature. A remote attacker on the local network can trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Firepower 4100 Series Next-Generation Firewall: 2.8 - 2.9

Firepower 9300 Series Security Appliances: 2.8 - 2.9

UCS 6200 Series Fabric Interconnects: 4.0 - 4.1

UCS 6300 Series Fabric Interconnects: 4.0 - 4.1

UCS 6400 Series Fabric Interconnects: 4.0 - 4.1

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-udld-rce-xetH6w35

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

Latest bulletins with this vulnerability

Out-of-bounds write in Cisco Unidirectional Link Detection feature in FXOS and NX-OS Software