title: Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability
description: A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to escalate their privilege level by executing commands authorized to other user roles. The attacker must authenticate with valid user credentials. The vulnerability is due to the incorrect implementation of a Bash shell command that allows role-based access control (RBAC) to be bypassed. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Bash prompt. A successful exploit could allow the attacker to escalate their privilege level by executing commands that should be restricted to other roles. For example, a dev-ops user could escalate their privilege level to admin with a successful exploit of this vulnerability.
problem types: CWE-264
affected:
{
product: Nexus 3000 Series Switches
vendor: Cisco
versions:
lessThan: 7.0(3)I7(4), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 3500 Platform Switches
vendor: Cisco
versions:
lessThan: 7.0(3)I7(4), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 3600 Platform Switches
vendor: Cisco
versions:
lessThan: 7.0(3)F3(5), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 7000 and 7700 Series Switches
vendor: Cisco
versions:
lessThan: 8.2(3), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 9000 Series Fabric Switches in ACI Mode
vendor: Cisco
versions:
lessThan: 13.2(4d), status: affected, version: unspecified, versionType: custom
lessThan: 14.0(1h), status: affected, version: unspecified, versionType: custom
}
{
product: Nexus 9000 Series Switches in Standalone NX-OS Mode
vendor: Cisco
versions:
lessThan: 7.0(3)I4(9), status: affected, version: unspecified, versionType: custom
lessThan: 7.0(3)I7(4), status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 7.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
version: 3.0
]
exploits: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.