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From: Marc Deslauriers
Reply-To: Ubuntu Security
To: "ubuntu-security-announce@lists.ubuntu.com"
Message-ID: <85fc971a-fdab-d759-d4c3-b2aaafde48ee@canonical.com>
Subject: [USN-4922-2] Ruby vulnerability
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==========================================================================
Ubuntu Security Notice USN-4922-2
April 26, 2021
ruby2.7 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04
Summary:
Ruby incorrectly handled XML documents.
Software Description:
- ruby2.7: Object-oriented scripting language
Details:
USN-4922-1 fixed a vulnerability in Ruby. This update provides the
corresponding update for Ubuntu 21.04.
Original advisory details:
Juho Nurminen discovered that the REXML gem bundled with Ruby incorrectly
parsed and serialized XML documents. A remote attacker could possibly use
this issue to perform an XML round-trip attack.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04:
libruby2.7 2.7.2-4ubuntu1.1
ruby2.7 2.7.2-4ubuntu1.1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-4922-2
https://ubuntu.com/security/notices/USN-4922-1
CVE-2021-28965
Package Information:
https://launchpad.net/ubuntu/+source/ruby2.7/2.7.2-4ubuntu1.1
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