ACL bypass via prior-packet decision reuse
Published Mar 4, 2024 · Updated Aug 2, 2024
Improper access control in Arista MOS with MultiAccess FPGA 1.6.x or 1.7.1 allows remote authenticated users to bypass port ACLs. The FPGA port ACL filter reuses the previous packet's ACL decision for the current packet after the condition is triggered. A 7130 Series FPGA must run MOS with an affected MultiAccess image; the stuck state can pass blocked traffic or drop allowed traffic until FPGA reload.
Summary
What happened
Improper access control in Arista MOS with MultiAccess FPGA 1.6.x or 1.7.1 allows remote authenticated users to bypass port ACLs. The FPGA port ACL filter reuses the previous packet's ACL decision for the current packet after the condition is triggered. A 7130 Series FPGA must run MOS with an affected MultiAccess image; the stuck state can pass blocked traffic or drop allowed traffic until FPGA reload.
The record
- CVE
- CVE-2023-6068
- Published
- Mar 4, 2024
- Updated
- Aug 2, 2024
- Vendor
- Arista Networks
- Product
- MOS (Metamako Operating System)
- Classifications
- CWE-283, CAPEC-1
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 4, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=1.6
- Affected versionversion=1.7.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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