USN-6424-1: kramdown vulnerability

10 October 2023

kramdown could be made to execute arbitrary code if it received specially crafted input.

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Releases

Packages

  • 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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04

In general, a standard system update will make all the necessary changes.

References

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Further reading