Virtuozzo 7 : readykernel-patch (VZA-2019-006)
Low Nessus Plugin ID 133451
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 vulnerability :
- A flaw was found in the implementation of userfaultfd.
An attacker is able to bypass file permissions on filesystems mounted with tmpfs/hugetlbs to modify a file and possibly disrupt normal system behaviour. At this time there is an understanding there is no crash or priviledge escalation but the impact of modifications on these filesystems of files in production systems may have adverse affects.
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.