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AUSCERT External Security Bulletin Redistribution
ESB-2019.1252
Ruby vulnerabilities
12 April 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: ruby
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Delete Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-8325 CVE-2019-8324 CVE-2019-8323
CVE-2019-8322 CVE-2019-8321 CVE-2019-8320
Reference: ESB-2019.1072
ESB-2019.0821
ESB-2019.0678
Original Bulletin:
http://www.ubuntu.com/usn/usn-3945-1
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Ubuntu Security Notice USN-3945-1
April 11, 2019
ruby1.9.1, ruby2.0, ruby2.3, ruby2.5 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 18.10
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Ruby.
Software Description:
- - ruby2.5: Interpreter of object-oriented scripting language Ruby
- - ruby2.3: Object-oriented scripting language
- - ruby1.9.1: Object-oriented scripting language
- - ruby2.0: Object-oriented scripting language
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 LTS:
 libruby2.5                       2.5.1-1ubuntu1.2
 ruby2.5                          2.5.1-1ubuntu1.2
Ubuntu 16.04 LTS:
 libruby2.3                       2.3.1-2~16.04.12
 ruby2.3                          2.3.1-2~16.04.12
Ubuntu 14.04 LTS:
 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:
 https://usn.ubuntu.com/usn/usn-3945-1
 CVE-2019-8320, CVE-2019-8321, CVE-2019-8322, CVE-2019-8323,
 CVE-2019-8324, CVE-2019-8325
Package Information:
 https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-5ubuntu4.3
 https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.2
 https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~16.04.12
 https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.484-2ubuntu1.14
 https://launchpad.net/ubuntu/+source/ruby2.0/2.0.0.484-1ubuntu2.13
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