Virtuozzo 7 : readykernel-patch (VZA-2017-065)
High Nessus Plugin ID 101822
Synopsis
The remote Virtuozzo host is missing a security update.
Description
According to the version of the vzkernel package and the readykernel-patch installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities :
- The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.
- If the sctp module was loaded on the host, a privileged user inside a container could make sctp listen on a socket in an inappropriate state, causing a kernel crash (use-after-free in sctp_wait_for_sndbuf()).
Note that Tenable Network Security has extracted the preceding description block directly from the Virtuozzo security advisory.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
Update the readykernel patch.