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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
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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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