Free and open-source vulnerability scanner
Mageni eases for you the vulnerability scanning, assessment, and management process. It is free and open-source.
Install NowAvailable for macOS, Windows, and Linux
CVE-2021-1523
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
Description
A vulnerability in Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, remote attacker to cause a queue wedge on a leaf switch, which could result in critical control plane traffic to the device being dropped. This could result in one or more leaf switches being removed from the fabric. This vulnerability is due to mishandling of ingress TCP traffic to a specific port. An attacker could exploit this vulnerability by sending a stream of TCP packets to a specific port on a Switched Virtual Interface (SVI) configured on the device. A successful exploit could allow the attacker to cause a specific packet queue to queue network buffers but never process them, leading to an eventual queue wedge. This could cause control plane traffic to be dropped, resulting in a denial of service (DoS) condition where the leaf switches are unavailable. Note: This vulnerability requires a manual intervention to power-cycle the device to recover..
CVSSv2.0 Score
- Severity
- Medium
- Base Score
- 5/10
- Exploit Score
- 10/10
- Access Vector
- Network
- Access Complexity
- Low
- Authentication Required
- None
- Impact Score
- 2.9/10
- Confidentiality Impact
- None
- Availability Impact
- Partial
- Integrity Impact
- None
CVSSv3.1 Score
- Severity
- High
- Base Score
- 8.6/10
- Exploit Score
- 3.9/10
- Access Vector
- Network
- Access Complexity
- Low
- Privileges Required
- None
- Impact Score
- 4/10
- Confidentiality Impact
- None
- Availability Impact
- High
- Integrity Impact
- None
- Scope
- Changed
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:o:cisco:nx-os:13.2\(3n\):*:*:*:*:*:*:* |
Yes
|
- | ||
cpe:2.3:o:cisco:nx-os:14.2\(4i\):*:*:*:*:*:*:* |
Yes
|
- | ||
cpe:2.3:h:cisco:nexus_93120tx:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_93128tx:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_9332pq:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_9372px:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_9372px-e:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_9372tx:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_9372tx-e:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_9396px:-:*:*:*:*:*:*:* |
No
|
- | ||
cpe:2.3:h:cisco:nexus_9396tx:-:*:*:*:*:*:*:* |
No
|
- |