CVE-2024-27891— On affected platforms running Arista EOS with MACsec and egress ACLs configured on the same interfaces, the ACL policies may not be enforced for packets egressing on those ports.
Possible ATT&CK Techniques 1AI
T1565.001 · Stored Data ManipulationAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Arista Networks | EOS | 4.32.0≤ 4.32.0.1F | affected |
4.31.0≤ 4.31.2F | affected | ||
4.30.0≤ 4.30.6M | affected | ||
4.29.0≤ 4.29.7M | affected | ||
4.28.0≤ 4.28.10.1M | affected | ||
4.27.2F< 4.28.0 | affected |
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I. Basic Information for CVE-2024-27891
Vulnerability Information
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Vulnerability Title
On affected platforms running Arista EOS with MACsec and egress ACLs configured on the same interfaces, the ACL policies may not be enforced for packets egressing on those ports.
Source: NVD (National Vulnerability Database)
Vulnerability Description
On affected platforms running Arista EOS with MACsec and egress ACLs configured on the same interfaces, the ACL policies may not be enforced for packets egressing on those ports. This can cause outgoing packets to incorrectly be allowed or denied.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Arista EOS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Arista EOS是美国Arista公司的一个完全可编程的、高度模块化的、基于Linux的网络操作系统。 Arista EOS存在安全漏洞，该漏洞源于在同一接口上配置MACsec和出口ACL时，ACL策略可能无法对从这些端口发出的数据包强制执行，导致出站数据包被错误允许或拒绝。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Arista Networks | EOS | 4.32.0 ~ 4.32.0.1F | - |
II. Public POCs for CVE-2024-27891
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2024-27891 (1)
Same Patch Batch · Arista Networks · 2026-06-04 · 6 CVEs total
| CVE-2024-27892 | 9.6 CRITICAL | On affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request ca |
| CVE-2024-27890 | 9.6 CRITICAL | On affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request ca |
| CVE-2025-8873 | 7.5 HIGH | Arista EOS Dataplane Denial of Service via Malformed IPsec Packet |
| CVE-2023-5502 | 5.9 MEDIUM | On affected platforms running Arista EOS with 802.1x authentication configured on the acce |
| CVE-2024-6858 | In Arista’s EOS when in 802.1X mode, multi-auth unauthenticated hosts might be allowed acc |
IV. Related Vulnerabilities
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Arista EOS IPsec Tunnel Sequence Number Mismatch via Interfa - CVE-2026-7473
Arista EOS Unexpected Tunnel Protocol Decapsulation and Forw - CVE-2025-8873
Arista EOS Dataplane Denial of Service via Malformed IPsec P - CVE-2023-5502
On affected platforms running Arista EOS with 802.1x authent - CVE-2024-27892
On affected platforms running Arista EOS with OpenConfig con
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V. Comments for CVE-2024-27891
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