CVE-2021-28511 Vulnerability Details

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CVE-2021-28511 Metadata Quick Info

CVE Published: 05/08/2022 | CVE Updated: 16/09/2024 | CVE Year: 2021
Source: Arista | Vendor: Arista Networks | Product: EOS
Status : PUBLISHED

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CVE-2021-28511 Description

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.

Metrics

CVSS Version: 3.1 | Base Score: 5.8 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

l➤ Exploitability Metrics:
    Attack Vector (AV)* NETWORK
    Attack Complexity (AC)* LOW
    Privileges Required (PR)* NONE
    User Interaction (UI)* NONE
    Scope (S)* CHANGED

l➤ Impact Metrics:
    Confidentiality Impact (C)* NONE
    Integrity Impact (I)* LOW
    Availability Impact (A)* NONE

Weakness Enumeration (CWE)

CWE-ID: CWE-284
CWE Name: CWE-284 Improper Access Control
Source: Arista Networks

Common Attack Pattern Enumeration and Classification (CAPEC)

CAPEC-ID:
CAPEC Description:


Source: NVD (National Vulnerability Database).