[security-announce] Kernel/n_tty security update

Sona Sarmadi sona.sarmadi at enea.com
Wed Jan 7 15:09:03 CET 2015

Product: Kernel/n_tty
Severity: Important
Issue date: 2015-01-07
CVE Names: CVE-2014-0196
A security patch that fixes CVE-2014-0196 is now available in the "http://linux.enea.com/4.0/patches" folder. 

Patch file: 0009-kernel-n_tty-CVE-2014-0196.patch
README file: 0009-kernel-n_tty-CVE-2014-0196.README

The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not 
properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users 
to cause a denial of service (memory corruption and system crash) or gain privileges by 
triggering a race condition involving read and write operations with long strings. 

https://cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2014-0196
How to apply the patches
If you don't have installed the Enea Linux 4.0 Release:
# wget http://linux.enea.com/4.0/Enea-Linux-4.0.tar.gz
# tar zxvf Enea-Linux-4.0.tar.gz
If you have already installed the Enea Linux 4.0 Release:
# cd Enea-Linux-4.0/poky/meta-enea
# wget http://linux.enea.com/4.0/patches/0009-kernel-n_tty-CVE-2014-0196.patch
# patch -p1 < ./0009-kernel-n_tty-CVE-2014-0196.patch
If you have any questions regarding the security patches and security updates please contact security at enea.com.
ESRT (Enea Security Response Team)
Sona Sarmadi
Software Engineer/Security Responsible for Enea Linux
Jan Stenbecks torg 17,
Box 1033, SE-164 21 Kista, Sweden
Direct: +46 8 5071  4475
Mobile: +46 70 971 4475
sona.sarmadi at enea.com

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