Description
In a CVX cluster, an EOS switch connected to a CVX server is not resilient to certain malformed messages received from the connected CVX server. Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality (Vulnerable System)
None
Integrity (Vulnerable System)
None
Availability (Vulnerable System)
High
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- Arista Networks / EOS / CloudVision eXchange (CVX)4.34.0F – 4.34.1F
- Arista Networks / EOS / CloudVision eXchange (CVX)4.33.0M – 4.33.4M
- Arista Networks / EOS / CloudVision eXchange (CVX)4.32.0M – 4.32.6M
- Arista Networks / EOS / CloudVision eXchange (CVX)4.31.0M – 4.31.8M
- Arista Networks / EOS / CloudVision eXchange (CVX)4.30.0 – 4.31.0