Netlink Message Sniffing Vulnerability

CVE-2017-17449 · LOW Severity

AV:L/AC:M/AU:N/C:P/I:N/A:N

The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.

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