USN-3528-1: Ruby vulnerabilities

Details

It was discovered that Ruby incorrectly handled certain terminal emulator
escape sequences. An attacker could use this to execute arbitrary code via
a crafted user name. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-10784)

It was discovered that Ruby incorrectly handled certain strings.
An attacker could use this to cause a denial of service. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-14033)

It was discovered that Ruby incorrectly handled some generating JSON.
An attacker could use this to possible expose sensitive information.
This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-14064)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to execute arbitrary code.
(CVE-2017-17790)

Update instructions

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

Ubuntu 17.10

• libruby2.3 - 2.3.3-1ubuntu1.2
• ruby2.3 - 2.3.3-1ubuntu1.2

Ubuntu 16.04

• libruby2.3 - 2.3.1-2~16.04.5
• ruby2.3 - 2.3.1-2~16.04.5

Ubuntu 14.04

• libruby1.9.1 - 1.9.3.484-2ubuntu1.7
• ruby1.9.1 - 1.9.3.484-2ubuntu1.7
• ruby1.9.3 - 1.9.3.484-2ubuntu1.7

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

References

• CVE-2017-10784
• CVE-2017-14033
• CVE-2017-14064
• CVE-2017-17790

Related notices

• USN-3685-1: libtcltk-ruby1.9.1, ruby1.9.3, ruby2.0-doc, ri1.9.1, libruby2.3, ruby1.9.1, ruby1.9.1-examples, ruby2.3-doc, libruby1.9.1, ruby2.3-tcltk, libruby2.0, ruby2.0-dev, ruby2.0-tcltk, ruby2.3, ruby1.9.1-dev, ruby2.3-dev, ruby1.9.1-full, ruby2.0
• USN-3439-1: libtcltk-ruby1.9.1, ruby1.9.3, ri1.9.1, ruby1.9.1, ruby1.9.1-examples, libruby1.9.1, ruby1.9.1-dev, ruby1.9.1-full