The State of XIoT Security Report: 1H 2022
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High Threat

CVE-2022-25897

The close session request closes a connected session. A deleteSubscription flag is also sent in that message and determines whether the server should save the subscriptions for a future session reconnection or discard them upon session termination. If the deleteSubscription flag is False the server will store the subscriptions thus filling up the memory in an unlimited manner.

Sending multiple subscribe requests with multiple monitored items from multiple sessions will quickly fill up the process memory until the server crashes.

To trigger this bug all is needed is to create many sessions with subscriptions and monitored items without ever deleting the monitored items. Eventually these allocations will consume all the available process memory which will lead to a crash and denial of service condition.

Risk Information

CVE ID

CVE-2022-25897

Vendor

Eclipse

Product

Milo package

CVSS v3

7.5


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