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@REPLYADDR Leonidas S. Barbosa
<leo.barbosa@canonical.com>
@REPLYTO 2:5075/128 Leonidas S. Barbosa
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==========================================================================
Ubuntu Security Notice USN-6055-2
May 05, 2023
ruby2.3, ruby2.5, ruby2.7 regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
Summary:
USN-6055-1 introduced a regression.
Software Description:
- ruby2.7: Object-oriented scripting language
- ruby2.5: Object-oriented scripting language
- ruby2.3: Object-oriented scripting language
Details:
USN-6055-1 fixed a vulnerability in Ruby. Unfortunately it introduced
a regression.
This update reverts the patches applied to CVE-2023-28755 in order
to fix the regression
pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that Ruby incorrectly handled certain regular expressions.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2023-28755)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS:
libruby2.7 2.7.0-5ubuntu1.10
ruby2.7 2.7.0-5ubuntu1.10
Ubuntu 18.04 LTS:
libruby2.5 2.5.1-1ubuntu1.15
ruby2.5 2.5.1-1ubuntu1.15
Ubuntu 16.04 ESM:
libruby2.3 2.3.1-2~ubuntu16.04.16+esm6
ruby2.3 2.3.1-2~ubuntu16.04.16+esm6
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6055-2
https://ubuntu.com/security/notices/USN-6055-1
CVE-2023-28755,
https://launchpad.net/bugs/2018547
Package Information:
https://launchpad.net/ubuntu/+source/ruby2.7/2.7.0-5ubuntu1.10
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.15
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