(0Day) Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability
March 25th, 2025
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Minimal user interaction is required to exploit this vulnerability.
The specific flaw exists within the processing of the User-Agent HTTP header. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to execute code in the context of root.
Additional Details
09/13/24 – ZDI reported the vulnerability to the vendor
01/08/25 - ZDI asked for updates
03/12/25 - ZDI notified the vendor of the intention to publish the case as a 0-day advisory
Disclosure Timeline
- 2024-09-13 - Vulnerability reported to vendor
- 2025-03-25 - Coordinated public release of advisory
- 2025-03-25 - Advisory Updated
Credit
Gereon Huppertz
