USN-3945-1: Ruby vulnerabilities

Details

It was discovered that Ruby incorrectly handled certain RubyGems.
An attacker could possibly use this issue to execute arbitrary commands.
(CVE-2019-8320)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2019-8321, CVE-2019-8322, CVE-2019-8323, CVE-2019-8324, CVE-2019-8325)

Update instructions

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

Ubuntu 18.10

• libruby2.5 - 2.5.1-5ubuntu4.3
• ruby2.5 - 2.5.1-5ubuntu4.3

Ubuntu 18.04

• libruby2.5 - 2.5.1-1ubuntu1.2
• ruby2.5 - 2.5.1-1ubuntu1.2

Ubuntu 16.04

• libruby2.3 - 2.3.1-2~16.04.12
• ruby2.3 - 2.3.1-2~16.04.12

Ubuntu 14.04

• libruby1.9.1 - 1.9.3.484-2ubuntu1.14
• libruby2.0 - 2.0.0.484-1ubuntu2.13
• ruby1.9.1 - 1.9.3.484-2ubuntu1.14
• ruby1.9.3 - 1.9.3.484-2ubuntu1.14
• ruby2.0 - 2.0.0.484-1ubuntu2.13

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

References

• CVE-2019-8320
• CVE-2019-8321
• CVE-2019-8322
• CVE-2019-8323
• CVE-2019-8324
• CVE-2019-8325