#VU25009 Out-of-bounds write


Published: 2020-02-06

Vulnerability identifier: #VU25009

Vulnerability risk: Low

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-2020-3119

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Cisco Nexus 3000 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Nexus 5500 Platform Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Nexus 5600 Platform Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Nexus 6000 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Nexus 9000 Series Switches in ACI Mode
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Nexus 9000 Series Switches NX-OS Mode
Hardware solutions / Routers & switches, VoIP, GSM, etc
UCS 6200 Series Fabric Interconnects
Hardware solutions / Routers & switches, VoIP, GSM, etc
UCS 6300 Series Fabric Interconnects
Hardware solutions / Routers & switches, VoIP, GSM, etc
UCS 6400 Series Fabric Interconnects
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to the Cisco Discovery Protocol parser for Cisco NX-OS does not properly validate input for certain fields in a Cisco Discovery Protocol message. A remote attacker on the local network can send a malicious Cisco Discovery Protocol packet to an affected device, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.
Versions 7.0(3)I7(8) for Nexus 3000 Series Switches and Nexus 9000 Series Switches in Standalone NX-OS Mode and 3.2(3m) for UCS 6200, 6300 and 6400 Series Fabric Interconnects will be released in February 2020.

Vulnerable software versions

Cisco Nexus 3000 Series Switches: 7.0.3 I - 9.2

Nexus 5500 Platform Switches: 7.1 - 7.3

Nexus 5600 Platform Switches: 7.1 - 7.3

Cisco Nexus 6000 Series Switches: 7.1 - 7.3

Cisco Nexus 9000 Series Switches in ACI Mode: 13.1 - 13.2

Cisco Nexus 9000 Series Switches NX-OS Mode: 7.0.3 F - 7.0.3 I

UCS 6200 Series Fabric Interconnects: 3.2 - 4.0

UCS 6300 Series Fabric Interconnects: 3.2 - 4.0

UCS 6400 Series Fabric Interconnects: 3.2 - 4.0


CPE

External links
http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-nxos-cdp-rce


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