USN-3808-1: Ruby vulnerabilities

Details

It was discovered that Ruby incorrectly handled certain X.509
certificates. An attacker could possibly use this issue to
bypass the certificate check. (CVE-2018-16395)

It was discovered that Ruby incorrectly handled certain
inputs. An attacker could possibly use this issue to execute
arbitrary code. (CVE-2018-16396)

Update instructions

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

Ubuntu 18.10

• libruby2.5 - 2.5.1-5ubuntu4.1
• ruby2.5 - 2.5.1-5ubuntu4.1

Ubuntu 18.04

• libruby2.5 - 2.5.1-1ubuntu1.1
• ruby2.5 - 2.5.1-1ubuntu1.1

Ubuntu 16.04

• libruby2.3 - 2.3.1-2~16.04.11
• ruby2.3 - 2.3.1-2~16.04.11

Ubuntu 14.04

• libruby1.9.1 - 1.9.3.484-2ubuntu1.13
• libruby2.0 - 2.0.0.484-1ubuntu2.11
• ruby1.9.1 - 1.9.3.484-2ubuntu1.13
• ruby1.9.3 - 1.9.3.484-2ubuntu1.13
• ruby2.0 - 2.0.0.484-1ubuntu2.11

In general, a standard system update will make all the necessary changes.

References

• CVE-2018-16395
• CVE-2018-16396