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CVE-2023-24513

On affected platforms running Arista CloudEOS a size check bypass issue in the Software Forwarding Engine (Sfe) may allow buffer over reads in later code. Additionally, depending on configured options this may cause a recomputation of the TCP checksum ...

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· also runs on 4 platforms

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Severity
HIGH7.5
Exploit prediction
EPSS 0.7%
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
amazon-aws-marketplace (environment) · arista-dca-200-veos (environment) · equinix-network-edge (environment) · google-google-cloud-platform-marketplace (environment) · microsoft-azure-marketplace (environment)
Arista EOS· Arista Networks
60%
4.26.0 ≤ v ≤ 4.26.9M4.27.0 ≤ v ≤ 4.27.8M4.28.0 ≤ v ≤ 4.28.5M4.29.0 ≤ v ≤ 4.29.1F4.26.04.27.04.28.04.29.0
Dca-200-Veos· Aristadevice
80%
All versions

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

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

Patch and advisory references

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

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-126CWE-125

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