CVE-2025-0936

Solution:

• The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2025-0936 has been fixed in the following releases: * 4.30.10M and later releases in the 4.30.x train * 4.31.7M and later releases in the 4.31.x train * 4.32.5M and later releases in the 4.32.x train * 4.33.2F and later releases

Workaround:

• There are a number of possible workarounds: Option 1 - disable accounting/logging for the OpenConfig transportFor example to disable accounting for transport named “default”: switch(config)#management api gnmi switch(config-mgmt-api-gnmi)#transport grpc default switch(config-gnmi-transport-default)#no accounting requests   to disable logging for the OpenConfig agent, run: switch(config)#no trace OpenConfig setting   Option 2 - disable the gNOI File service entirelyTo disable the gNOI File service, override the OCGNOIFileToggle, then restart OpenConfig to load the changes switch#bash timeout 100 echo "OCGNOIFileToggle=0" >> /mnt/flash/toggle_override switch#agent OpenConfig terminate   Disabling the gNOI File service will mean that gNOI clients will no longer be able to call any gNOI File RPCs Option 3 - block the TransferToRemote RPC using gNSI AuthzFor releases with gNSI Authz (EOS 4.31.0F and later releases), the TransferToRemote RPC can be blocked using gNSI Authz. First enable gNSI Authz service by adding the following config: switch(config)#management api gnsi switch(config-mgmt-api-gnsi)#service authz Where [NAME] is the name of the running gNMI transport Adding this config will cause the named gNMI transport to reload. Next update the authz policy to block access to the TransferToRemote RPC. This can be done directly on the system by updating the Authz policy file and waiting at least 10 seconds for OpenConfig to reload the changes: switch#bash timeout 100 echo "{\"name\":\"block gNOI TransferToRemote policy\",\"allow_rules\":[{\"name\":\"allow_all\"}],\"deny_rules\":[{\"name\":\"no-one-can-use-gnoi-transfer-to-remote\",\"request\":{\"paths\":[\"/gnoi.file.File/TransferToRemote\"]}}]}" | sudo tee /persist/sys/gnsi/authz/policy.json && sleep 11   This will cause attempts to run the TransferToRemote RPC to fail with a “PermissionDenied” error code.