CVE-2017-12331

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Summary

CVECVE-2017-12331
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-11-30 09:29:00 UTC
Updated2025-04-20 01:37:25 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.0 6.7 MEDIUM from [email protected]

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000350000 probability, percentile 0.103150000 (date 2026-05-14)

Problem Types: CWE-347 | CWE-347 CWE-347

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary6.7MEDIUMCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:L/AC:L/Au:N/C:C/I:C/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Cisco Nx-os 8.1\(1\) All All All
Application Cisco Unified Computing System 7.0\(0\)hsk\(0.357\) All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Cisco NX-OS affected Cisco NX-OS Not specified

References

ReferenceSourceLinkTags
Cisco NX-OS Flaw Lets Local Users Bypass Software Patch Signature Verification - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
Cisco NX-OS System Software Patch Signature Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 tools.cisco.com Vendor Advisory
Cisco NX-OS System Software CVE-2017-12331 Local Security Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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