CVE-2023-24545

On affected platforms running Arista CloudEOS an issue in the Software Forwarding Engine (Sfe) can lead to a potential denial of service attack by sending malformed packets to the switch.

HIGH

7.5

CVSS Score

Published: April 12, 2023 at 12:00 AM UTC

Updated: June 17, 2026 at 05:39 AM UTC

3 products affected across 2 vendorsCloudeosDca-200-VeosArista EOS

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Severity

HIGH7.5

Exploit prediction

EPSS 0.8%

SSVC

No known exploit

Description

On affected platforms running Arista CloudEOS an issue in the Software Forwarding Engine (Sfe) can lead to a potential denial of service attack by sending malformed packets to the switch. This causes a leak of packet buffers and if enough malformed packets are received, the switch may eventually stop forwarding traffic.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cloudeos · Arista

95%

4.26.0 ≤ v < 4.26.9m4.27.0 ≤ v < 4.27.8m4.28.0 ≤ v < 4.28.5m4.29.0 ≤ v < 4.29.2f

Affected range stops below 4.26.9m, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.27.8m, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.28.5m, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.29.2f, so it looks safe — our inference, not a vendor statement

arista-dca-200-veos (environment)

Arista EOS · Arista Networks

60%

4.27.0 ≤ v ≤ 4.27.7M4.28.0 ≤ v ≤ 4.28.4M4.29.0 ≤ v ≤ 4.29.1F4.26.8M 4.27.0 4.28.0 4.29.0

Dca-200-Veos · Aristadevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.arista.com/en/support/advisories-notices/security-advisory/17240-security-advisory-0085

References (1)

ExploitPatchVendor Advisory

Source: [email protected]

https://www.arista.com/en/support/advisories-notices/security-advisory/17240-security-advisory-0085

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHArista

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-400

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