What’s Vulnerable › Vulnerabilities

CVE-2017-12331

• Severity: medium (CVSS 6.7 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-30 · updated 2026-06-17
• Weakness: CWE-347

Description

A vulnerability in Cisco NX-OS System Software could allow an authenticated, local attacker to bypass signature verification when loading a software patch. The vulnerability is due to insufficient NX-OS signature verification for software patches. An authenticated, local attacker could exploit this vulnerability to bypass signature verification and load a crafted, unsigned software patch on a targeted device. The attacker would need valid administrator credentials to perform this exploit. This vulnerability affects the following products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Unified Computing System Manager. Cisco Bug IDs: CSCvf16494, CSCvf23655.

Affected products

• Cisco NX-OS: 8.1(1)
• Cisco Unified Computing System (Managed): 7.0(0)hsk(0.357)

References

• http://www.securityfocus.com/bid/102159
• http://www.securitytracker.com/id/1039930
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos
• http://www.securityfocus.com/bid/102159
• http://www.securitytracker.com/id/1039930
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos

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