Virtuozzo 7 : readykernel-patch (VZA-2017-083)
Medium Nessus Plugin ID 103426
SynopsisThe remote Virtuozzo host is missing a security update.
DescriptionAccording 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 :
- ChunYu Wang from Red Hat found a netlink use-after-free issue by syzkaller. Access to already freed memory (groups in struct netlink_sock) could cause host crash or memory corruption.
- An unprivileged user inside a container could cause a denial of service (kernel crash in user_read() function) using a specially crafted sequence of system calls.
- The iscsi_if_rx function in drivers/scsi/scsi_transport_iscsi.c in the Linux kernel through 4.13.2 allows local users to cause a denial of service (panic) by leveraging incorrect length validation.
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.
SolutionUpdate the readykernel patch.