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Ubuntu Security Notice USN-2922-1
March 08, 2016
samba vulnerabilities
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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 Samba.
Software Description:
– samba: SMB/CIFS file, print, and login server for Unix
Details:
Jeremy Allison discovered that Samba incorrectly handled ACLs on symlink
paths. A remote attacker could use this issue to overwrite the ownership of
ACLs using symlinks. (CVE-2015-7560)
Garming Sam and Douglas Bagnall discovered that the Samba internal DNS
server incorrectly handled certain DNS TXT records. A remote attacker could
use this issue to cause Samba to crash, resulting in a denial of service,
or possibly obtain uninitialized memory contents. This issue only applied
to Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2016-0771)
It was discovered that the Samba Web Administration Tool (SWAT) was
vulnerable to clickjacking and cross-site request forgery attacks. This
issue only affected Ubuntu 12.04 LTS. (CVE-2013-0213, CVE-2013-0214)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 15.10:
samba 2:4.1.17+dfsg-4ubuntu3.3
Ubuntu 14.04 LTS:
samba 2:4.1.6+dfsg-1ubuntu2.14.04.13
Ubuntu 12.04 LTS:
samba 2:3.6.3-2ubuntu2.17
swat 2:3.6.3-2ubuntu2.17
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2922-1
CVE-2013-0213, CVE-2013-0214, CVE-2015-7560, CVE-2016-0771
Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.1.17+dfsg-4ubuntu3.3
https://launchpad.net/ubuntu/+source/samba/2:4.1.6+dfsg-1ubuntu2.14.04.13
https://launchpad.net/ubuntu/+source/samba/2:3.6.3-2ubuntu2.17
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