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Ubuntu Security Notice USN-3908-2

Ubuntu Security Notice USN-3908-2
Posted Mar 14, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3908-2 - USN-3908-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM. Jann Horn discovered a race condition in the fork system call in the Linux kernel. A local attacker could use this to gain access to services that cache authorizations. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-6133
MD5 | dbb305ea7db319ebed15a4e2411d5c52

Ubuntu Security Notice USN-3908-2

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-3908-2
March 13, 2019

linux-lts-trusty vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

The system could be made to run programs as an administrator.

Software Description:
- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM

Details:

USN-3908-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

Jann Horn discovered a race condition in the fork() system call in the
Linux kernel. A local attacker could use this to gain access to services
that cache authorizations.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
linux-image-3.13.0-166-generic 3.13.0-166.216~precise1
linux-image-3.13.0-166-generic-lpae 3.13.0-166.216~precise1
linux-image-3.13.0-166-lowlatency 3.13.0-166.216~precise1
linux-image-generic-lpae-lts-trusty 3.13.0.166.156
linux-image-generic-lts-trusty 3.13.0.166.156

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
https://usn.ubuntu.com/usn/usn-3908-2
https://usn.ubuntu.com/usn/usn-3908-1
CVE-2019-6133
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