#VU9480 Security restrictions bypass in Nexus 7700 Series Switches and Nexus 7000 Series Switches - CVE-2017-12333

Vulnerability identifier: #VU9480

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-12333

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Nexus 7700 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc
Nexus 7000 Series Switches
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a local attacker to bypass security restrictions on the target system.

The weakness exists in Cisco NX-OS System Software due to insufficient NX-OS signature verification for software images. A local attacker with knowledge of valid administrator credentials can bypass signature verification and load a crafted, unsigned software image.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Nexus 7700 Series Switches: All versions

Nexus 7000 Series Switches: All versions

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos2

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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.