CVE-2024-8000

Unauthorized traffic flows via truncated dynamic ACLs

Published Mar 4, 2025 · Updated Mar 4, 2025

Improper access control in affected Arista EOS releases allows adjacent attackers to create unauthorized traffic flows after an ASU restart. During ASU, EOS restores only the first rule of a multi-line dynamic ACL received from an external AAA server, leaving later access-control rules unenforced. Exposure requires 802.1X, a multi-line AAA-supplied ACL, a pending captive-portal supplicant, and an ASU between affected releases; the result is network-policy bypass.

CVSS severity5.3
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in affected Arista EOS releases allows adjacent attackers to create unauthorized traffic flows after an ASU restart. During ASU, EOS restores only the first rule of a multi-line dynamic ACL received from an external AAA server, leaving later access-control rules unenforced. Exposure requires 802.1X, a multi-line AAA-supplied ACL, a pending captive-portal supplicant, and an ASU between affected releases; the result is network-policy bypass.

The record

CVE
CVE-2024-8000
Published
Mar 4, 2025
Updated
Mar 4, 2025
Vendor
Arista Networks
Product
Arista EOS
Classifications
CWE-1284
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.30.0 <=4.30.8M
  2. Affected versionversion=4.31.0 <=4.31.5M
  3. Affected versionversion=4.32.0 <=4.32.4M

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Arista Networks · Arista EOSversion=4.30.0 <=4.30.8M; version=4.31.0 <=4.31.5M; version=4.32.0 <=4.32.4M

Published CVSS scores

5.3Arista Networks, Inc.CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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