ESB-2019.0791.2 - UPDATE [Ubuntu] Linux kernel: Root compromise - Existing account 2019-03-15

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2019.0791.2
                   USN-3908: Linux kernel vulnerability
                               15 March 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Linux kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6133  

Reference:         ESB-2019.0716
                   ESB-2019.0691
                   ESB-2019.0609
                   ESB-2019.0291

Original Bulletin: 
   https://usn.ubuntu.com/3908-1/
   https://usn.ubuntu.com/3908-2/

Comment: This bulletin contains two (2) Ubuntu security advisories.

Revision History:  March 15 2019: Added USN-3908-2 for 12.04 ESM
                   March 13 2019: Initial Release

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USN-3908-1: Linux kernel vulnerability

12 March 2019

linux vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 14.04 LTS

Summary

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

Software Description

  o linux - Linux kernel

Details

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 14.04 LTS
    linux-image-3.13.0-166-generic - 3.13.0-166.216
    linux-image-3.13.0-166-generic-lpae - 3.13.0-166.216
    linux-image-3.13.0-166-lowlatency - 3.13.0-166.216
    linux-image-3.13.0-166-powerpc-e500 - 3.13.0-166.216
    linux-image-3.13.0-166-powerpc-e500mc - 3.13.0-166.216
    linux-image-3.13.0-166-powerpc-smp - 3.13.0-166.216
    linux-image-3.13.0-166-powerpc64-emb - 3.13.0-166.216
    linux-image-3.13.0-166-powerpc64-smp - 3.13.0-166.216
    linux-image-generic - 3.13.0.166.177
    linux-image-generic-lpae - 3.13.0.166.177
    linux-image-lowlatency - 3.13.0.166.177
    linux-image-powerpc-e500 - 3.13.0.166.177
    linux-image-powerpc-e500mc - 3.13.0.166.177
    linux-image-powerpc-smp - 3.13.0.166.177
    linux-image-powerpc64-emb - 3.13.0.166.177
    linux-image-powerpc64-smp - 3.13.0.166.177
    linux-image-virtual - 3.13.0.166.177

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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

  o CVE-2019-6133

- --------------------------------------------------------------------------------

USN-3908-2: Linux kernel (Trusty HWE) vulnerability

13 March 2019

linux-lts-trusty vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 12.04 ESM

Summary

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

Software Description

  o 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

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