This advisory documents the impact of an internally found vulnerability in Arista EOS for security ACL bypass. The impact of this vulnerability is that the security ACL drop rule might be bypassed if a NAT ACL rule filter with permit action matches the packet flow. This could allow a host with an IP address in a range that matches the range allowed by a NAT ACL and a range denied by a Security ACL to be forwarded incorrectly as it should have been denied by the Security ACL. This can enable an ACL bypass.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, for affected systems. Impacting 16 products from arista, from arista, from arista and 13 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2022-08-05T17:15:07.957
2024-11-21T05:59:48.747
Modified
CVSSv3.1: 5.8 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | arista | eos | ≤ 4.24.9 | Yes |
| Operating System | arista | eos | ≤ 4.25.8 | Yes |
| Operating System | arista | eos | ≤ 4.26.5 | Yes |
| Operating System | arista | eos | ≤ 4.27.3 | Yes |
| Hardware | arista | 7050cx3-32s | - | No |
| Hardware | arista | 7050cx3m-32s | - | No |
| Hardware | arista | 7050sx3-48c8 | - | No |
| Hardware | arista | 7050sx3-48yc | - | No |
| Hardware | arista | 7050sx3-48yc12 | - | No |
| Hardware | arista | 7050sx3-48yc8 | - | No |
| Hardware | arista | 7050sx3-96yc8 | - | No |
| Hardware | arista | 7050tx3-48c8 | - | No |
| Hardware | arista | 720xp-24y6 | - | No |
| Hardware | arista | 720xp-24zy4 | - | No |
| Hardware | arista | 720xp-48y6 | - | No |
| Hardware | arista | 720xp-48zc2 | - | No |
| Hardware | arista | 720xp-96zc2 | - | No |
| Hardware | arista | 7300x3-32c | - | No |
| Hardware | arista | 7300x3-48yc4 | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For arista's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.