#VU13440 Buffer overflow in Cisco NX-OS - CVE-2018-0303

Vulnerability identifier: #VU13440

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-0303

CWE-ID: CWE-120

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Cisco NX-OS
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

The vulnerability allows an adjacent attacker to execute arbitrary code on the target system.

The vulnerability exists in the Cisco Discovery Protocol component due to buffer overflow when insufficient validation of Cisco Discovery Protocol packet headers. An adjacent attacker can send a specially crafted Cisco Discovery Protocol packet to a Layer 2 adjacent affected device, trigger memory corruption and cause the service to crash or execute arbitrary code with root privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cisco NX-OS: All versions

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-fxnxos-dos

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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