Ubuntu Security Notice USN-3092-1

28th September, 2016

samba vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

Samba could be tricked into connecting to impersonated servers.

Software description

• samba
  – SMB/CIFS file, print, and login server for Unix

Details

Stefan Metzmacher discovered that Samba incorrectly handled certain flags
in SMB2/3 client connections. A remote attacker could use this issue to
disable client signing and impersonate servers by performing a man in the
middle attack.

Samba has been updated to 4.3.11 in Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
In addition to the security fix, the updated packages contain bug fixes,
new features, and possibly incompatible changes.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.04 LTS:

samba

2:4.3.11+dfsg-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:

samba

2:4.3.11+dfsg-0ubuntu0.14.04.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

CVE-2016-2119

Ubuntu Security Notice USN-3093-1

28th September, 2016

clamav vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

ClamAV could be made to crash or run programs if it processed a specially
crafted file.

Software description

• clamav
  – Anti-virus utility for Unix

Details

It was discovered that ClamAV incorrectly handled certain malformed files.
A remote attacker could use this issue to cause ClamAV to crash, resulting
in a denial of service, or possibly execute arbitrary code.

In the default installation, attackers would be isolated by the ClamAV
AppArmor profile.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.04 LTS:

clamav

0.99.2+dfsg-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:

clamav

0.99.2+addedllvm-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:

clamav

0.99.2+addedllvm-0ubuntu0.12.04.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

CVE-2016-1371,

CVE-2016-1372,

CVE-2016-1405