Ubuntu Security Notice USN-6424-1 ≈ Packet Storm

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Ubuntu Security Notice USN-6424-1^[6]: Authored by Ubuntu ^[7] | Site security.ubuntu.com ^[8]; Ubuntu Security Notice 6424-1 - It was discovered that kramdown did not restrict Rouge formatters to the correct namespace. An attacker could use this issue to cause kramdown to execute arbitrary code.; systems | linux ^[9], ubuntu ^[10]; advisories | CVE-2021-28834 ^[11]; SHA-256 | cb84ed93ee82dec6af195f72986f8154e0b895e8bab9ab6209eb559862c1420d; Download ^[12] | Favorite ^[13] | View ^[14]

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Ubuntu Security Notice USN-6424-1
October 10, 2023
ruby-kramdown vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
kramdown could be made to execute arbitrary code if it received specially
crafted input.
Software Description:
- ruby-kramdown: Fast, pure-Ruby Markdown-superset converter - ruby library
Details:
It was discovered that kramdown did not restrict Rouge formatters to the
correct namespace. An attacker could use this issue to cause kramdown to
execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS:
ruby-kramdown                   1.17.0-4ubuntu0.2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6424-1
CVE-2021-28834
Package Information:
https://launchpad.net/ubuntu/+source/ruby-kramdown/1.17.0-4ubuntu0.2