Kernel security update: Virtuozzo ReadyKernel patch 11.0 for kernel 3.10.0-327.36.1.vz7.20.18 (Virtuozzo 7.0.3)¶
Issue date: 2017-02-21
Applies to: Virtuozzo 7.0
Virtuozzo Advisory ID: VZA-2017-007
The cumulative Virtuozzo ReadyKernel patch updated with security fixes as well as a usability bug fix. The patch applies to Virtuozzo 7.0.3.
2. Security Fixes¶
[Moderate] A double free vulnerability was found in netlink_dump, which could cause a denial of service or possibly other unspecified impact. (CVE-2016-9806)
[Moderate] It was discovered that the Linux kernel since 3.6-rc1 with ‘net.ipv4.tcp_fastopen’ set to 1 can hit BUG() statement in tcp_collapse() function after making a number of certain syscalls leading to a possible system crash. (CVE-2016-8645)
[Moderate] A flaw was found in the way nfnetlink validated length of batch messages that could allow a user logged in to a container as root to cause a general protection fault and crash the host. (PSBM-57511)
[Moderate] A flaw was found in the way nfnetlink handled errors while processing batch messages that could allow a user logged in to a container as root to trigger use after free and crash the host. (PSBM-57499)
[Low] A security flaw was found in the Linux kernel that an attempt to move page mapped by AIO ring buffer to the other node triggers NULL pointer dereference at trace_writeback_dirty_page(), because aio_fs_backing_dev_info.dev is 0. (CVE-2016-3070)
3. Bug Fixes¶
It was not possible to set up port forwarding in containers for which the ‘–netfilter’ option was set to ‘full’. (PSBM-59983)
4. Installing the Update¶
Download, install, and instantly apply the patch to the current kernel by running ‘readykernel update’.
The JSON file with the list of new and updated packages is available at http://docs.virtuozzo.com/vza/VZA-2017-007.json.