news 28 Posted May 17, 2017 ========================================================================== Kernel Live Patch Security Notice LSN-0022-1 May 16, 2017 linux vulnerability ========================================================================== A security issue affects these releases of Ubuntu: | Series | Base kernel | Arch | flavors | |------------------+--------------+----------+------------------| | Ubuntu 16.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 16.04 LTS | 4.4.0 | amd64 | lowlatency | Summary: Several security issues were fixed in the kernel. Software Description: - linux: Linux kernel Details: It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-7374) Andreas Gruenbacher and Jan Kara discovered that the filesystem implementation in the Linux kernel did not clear the setgid bit during a setxattr call. A local attacker could use this to possibly elevate group privileges. (CVE-2016-7097) Update instructions: The problem can be corrected by up[censored] your livepatches to the following versions: | Kernel | Version | flavors | |-----------------+----------+--------------------------| | 4.4.0-21.37 | 22.5 | generic, lowlatency | | 4.4.0-22.39 | 22.4 | generic, lowlatency | | 4.4.0-22.40 | 22.4 | generic, lowlatency | | 4.4.0-24.43 | 22.4 | generic, lowlatency | | 4.4.0-28.47 | 22.4 | generic, lowlatency | | 4.4.0-31.50 | 22.4 | generic, lowlatency | | 4.4.0-34.53 | 22.4 | generic, lowlatency | | 4.4.0-36.55 | 22.4 | generic, lowlatency | | 4.4.0-38.57 | 22.4 | generic, lowlatency | | 4.4.0-42.62 | 22.4 | generic, lowlatency | | 4.4.0-43.63 | 22.4 | generic, lowlatency | | 4.4.0-45.66 | 22.4 | generic, lowlatency | | 4.4.0-47.68 | 22.4 | generic, lowlatency | | 4.4.0-51.72 | 22.4 | generic, lowlatency | | 4.4.0-53.74 | 22.4 | generic, lowlatency | | 4.4.0-57.78 | 22.4 | generic, lowlatency | | 4.4.0-59.80 | 22.4 | generic, lowlatency | | 4.4.0-62.83 | 22.4 | generic, lowlatency | | 4.4.0-63.84 | 22.4 | generic, lowlatency | | 4.4.0-64.85 | 22.4 | generic, lowlatency | | 4.4.0-66.87 | 22.4 | generic, lowlatency | | 4.4.0-67.88 | 22.4 | generic, lowlatency | | 4.4.0-70.91 | 22.4 | generic, lowlatency | | 4.4.0-71.92 | 22.4 | generic, lowlatency | | 4.4.0-71.92 | 22.4 | generic, lowlatency | | 4.4.0-72.93 | 22.4 | generic, lowlatency | Additionally, you should install an updated kernel with these fixes and reboot at your convienience. References: CVE-2016-7097, CVE-2017-7374 -- Share this post Link to post
