==========================================================================
Ubuntu Security Notice USN-2966-1
May 09, 2016
openssh vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 15.10
– Ubuntu 14.04 LTS
– Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in OpenSSH.
Software Description:
– openssh: secure shell (SSH) for secure access to remote machines
Details:
Shayan Sadigh discovered that OpenSSH incorrectly handled environment files
when the UseLogin feature is enabled. A local attacker could use this issue
to gain privileges. (CVE-2015-8325)
Ben Hawkes discovered that OpenSSH incorrectly handled certain network
traffic. A remote attacker could possibly use this issue to cause OpenSSH
to crash, resulting in a denial of service. This issue only applied to
Ubuntu 15.10. (CVE-2016-1907)
Thomas Hoger discovered that OpenSSH incorrectly handled untrusted X11
forwarding when the SECURITY extension is disabled. A connection configured
as being untrusted could get switched to trusted in certain scenarios,
contrary to expectations. (CVE-2016-1908)
It was discovered that OpenSSH incorrectly handled certain X11 forwarding
data. A remote authenticated attacker could possibly use this issue to
bypass certain intended command restrictions. (CVE-2016-3115)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 15.10:
openssh-server 1:6.9p1-2ubuntu0.2
Ubuntu 14.04 LTS:
openssh-server 1:6.6p1-2ubuntu2.7
Ubuntu 12.04 LTS:
openssh-server 1:5.9p1-5ubuntu1.9
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2966-1
CVE-2015-8325, CVE-2016-1907, CVE-2016-1908, CVE-2016-3115
Package Information:
https://launchpad.net/ubuntu/+source/openssh/1:6.9p1-2ubuntu0.2
https://launchpad.net/ubuntu/+source/openssh/1:6.6p1-2ubuntu2.7
https://launchpad.net/ubuntu/+source/openssh/1:5.9p1-5ubuntu1.9
—–BEGIN PGP SIGNATURE—–
Version: GnuPG v2
iQIcBAEBCgAGBQJXMOVfAAoJEGVp2FWnRL6TVD8P/3qwPpx94rAFkFdQWi7/aJ/g
FXmxgR0BfJbOJUbcWinfXT4EulDypk0kaoEHT9Bf47JhxdLVlA+gbfZqIVqjYDDl
3PtVzAkdQ9DANW1YDNx1cuI/ZFAt5ICmYnWSAqVRbAMept1B19n/16B19E8a3K2P
bVQDO8GmT4RB9zL1BEJrj7U8hhuGVf77FgqtPdD4ktcDKWV37UGdTt68tcS7fKhO
k56SkK/YCBMkqFFQEJmnTYp7MfuAHi+zgco04rU+2yiWFb6Lzrc18cnsOtNDtixr
rmJfgqImio9WY7E0l68knU0ldQY5oPQcAaR+etc4wkS7lz9QciH/Uk/2LQKkdDK9
VscjPXRyt/R/PmwxYM5I5/dV5eAEn8FmaFRe1Ad5jvhm9v8ovwCIrVqm/ztCuG9n
6MT0GU4n5TRaIF4FHk+vFL29yznVnWwrmoECy1Ad3N0Gr4+H+SCgKWeg/hK52/RV
QkMsFoZTShiGTFYFnmuxacHoCUF7BP1+1vkAdhNGf3G5B0v7dQDZbxDISiTMh3zr
zDm0bNZHtcRwRyoF63m8X/kGe5tsmewqmcoqQlQjyuw0DMW5NMKdQbEy38LFammx
XIvA7E3dIYq5EoL3pDlVlxhCmoMN8q6cci5Y+6dPjtdG7pR27U2+h+cPr20iE7MS
fiyf3fQlz1O29xSAe8MX
=//5M
—–END PGP SIGNATURE—–
—
