CVE-2024-12830: Arista NG Firewall custom_handler Directory Traversal Remote Code Execution Vulnerability

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-20 · updated 2026-06-17
Weakness: CWE-22

Description

Arista NG Firewall custom_handler Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the custom_handler method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of the www-data user. Was ZDI-CAN-24019.

Affected products

Arista Networks Arista Edge Threat Management - Arista Next Generation Firewall (NGFW): 17.1.1

References

https://www.zerodayinitiative.com/advisories/ZDI-24-1718/

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