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AUSCERT External Security Bulletin Redistribution
ESB-2018.3467
Ruby vulnerabilities
6 November 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Ruby
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Modify Arbitrary Files -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-16396 CVE-2018-16395
Reference: ESB-2018.3444
Original Bulletin:
http://www.ubuntu.com/usn/usn-3808-1
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Ubuntu Security Notice USN-3808-1
November 05, 2018
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 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 LTS:
libruby2.5 2.5.1-1ubuntu1.1
ruby2.5 2.5.1-1ubuntu1.1
Ubuntu 16.04 LTS:
libruby2.3 2.3.1-2~16.04.11
ruby2.3 2.3.1-2~16.04.11
Ubuntu 14.04 LTS:
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:
https://usn.ubuntu.com/usn/usn-3808-1
CVE-2018-16395, CVE-2018-16396
Package Information:
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-5ubuntu4.1
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.1
https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~16.04.11
https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.484-2ubuntu1.13
https://launchpad.net/ubuntu/+source/ruby2.0/2.0.0.484-1ubuntu2.11
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