Debian Security Advisory

DSA-3983-1 samba -- security update

Date Reported:
22 Sep 2017
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2017-12150, CVE-2017-12151, CVE-2017-12163.
More information:

Multiple security issues have been discoverd in Samba, a SMB/CIFS file, print, and login server for Unix:

  • CVE-2017-12150

    Stefan Metzmacher discovered multiple code paths where SMB signing was not enforced.

  • CVE-2017-12151

    Stefan Metzmacher discovered that tools using libsmbclient did not enforce encryption when following DFS redirects, which could allow a man-in-the-middle attacker to read or modify connections which were meant to be encrypted.

  • CVE-2017-12163

    Yihan Lian and Zhibin Hu discovered that insufficient range checks in the processing of SMB1 write requests could result in disclosure of server memory.

For the oldstable distribution (jessie), these problems have been fixed in version 2:4.2.14+dfsg-0+deb8u8.

For the stable distribution (stretch), these problems have been fixed in version 2:4.5.8+dfsg-2+deb9u2.

We recommend that you upgrade your samba packages.