description: A vulnerability in the SFTP server implementation for Cisco Nexus 3000 Series Switches and 9000 Series Switches in standalone NX-OS mode could allow an authenticated, remote attacker to download or overwrite files from the underlying operating system of an affected device.
This vulnerability is due to a logic error when verifying the user role when an SFTP connection is opened to an affected device. An attacker could exploit this vulnerability by connecting and authenticating via SFTP as a valid, non-administrator user. A successful exploit could allow the attacker to read or overwrite files from the underlying operating system with the privileges of the authenticated user.
There are workarounds that address this vulnerability.
problem types: Lack of Administrator Control over Security
affected:
{
vendor: Cisco
product: Cisco NX-OS Software
versions:
version: 9.2(1), status: affected
version: 9.2(2), status: affected
version: 9.2(2t), status: affected
version: 9.2(3), status: affected
version: 9.2(4), status: affected
version: 9.2(2v), status: affected
version: 9.3(1), status: affected
version: 9.3(2), status: affected
version: 9.3(3), status: affected
version: 9.3(4), status: affected
version: 9.3(5), status: affected
version: 9.3(6), status: affected
version: 9.3(7), status: affected
version: 9.3(7a), status: affected
version: 9.3(8), status: affected
version: 9.3(9), status: affected
version: 9.3(10), status: affected
version: 9.3(11), status: affected
version: 10.1(1), status: affected
version: 10.1(2), status: affected
version: 10.1(2t), status: affected
version: 10.2(1), status: affected
version: 10.2(1q), status: affected
version: 10.2(2), status: affected
version: 10.2(3), status: affected
version: 10.2(3t), status: affected
version: 10.2(4), status: affected
version: 10.2(5), status: affected
version: 10.3(1), status: affected
version: 10.3(2), status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
baseScore: 5.4
baseSeverity: MEDIUM
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: LOW
integrityImpact: LOW
availabilityImpact: NONE
]
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.