7.5 - USN-3571-1

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

- Ubuntu 17.10 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Erlang.

Software Description: - erlang: Concurrent, real-time, distributed functional language

Details:

It was discovered that the Erlang FTP module incorrectly handled certain CRLF sequences. A remote attacker could possibly use this issue to inject arbitrary FTP commands. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-1693)

It was discovered that Erlang incorrectly checked CBC padding bytes. A remote attacker could possibly use this issue to perform a padding oracle attack and decrypt traffic. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-2774)

It was discovered that Erlang incorrectly handled certain regular expressions. A remote attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-10253)

Hanno Böck, Juraj Somorovsky and Craig Young discovered that the Erlang otp TLS server incorrectly handled error reporting. A remote attacker could possibly use this issue to perform a variation of the Bleichenbacher attack and decrypt traffic or sign messages. (CVE-2017-1000385)

Update instructions:

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

Ubuntu 17.10:
erlang 1:20.0.4+dfsg-1ubuntu1.1

Ubuntu 16.04 LTS:
erlang 1:18.3-dfsg-1ubuntu3.1

Ubuntu 14.04 LTS:
erlang 1:16.b.3-dfsg-1ubuntu2.2

After a standard system update you need to reboot your computer to make all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3571-1
CVE-2014-1693, CVE-2015-2774, CVE-2016-10253, CVE-2017-1000385

Package Information:
https://launchpad.net/ubuntu/+source/erlang/1:20.0.4+dfsg-1ubuntu1.1
https://launchpad.net/ubuntu/+source/erlang/1:18.3-dfsg-1ubuntu3.1
https://launchpad.net/ubuntu/+source/erlang/1:16.b.3-dfsg-1ubuntu2.2