[USN-4562-1] kramdown vulnerability

Mike Salvatore mike.salvatore at canonical.com
Wed Sep 30 22:02:04 UTC 2020

Ubuntu Security Notice USN-4562-1
September 30, 2020

ruby-kramdown vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS


kramdown could be made to crash, run programs, or leak sensitive information if
it opened a specially crafted file.

Software Description:
- ruby-kramdown: Fast, pure-Ruby Markdown-superset converter - ruby library


It was discovered that kramdown insecurely handled certain crafted input.
An attacker could use this vulnerability to read restricted files or
execute arbitrary code.

Update instructions:

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

Ubuntu 20.04 LTS:
  kramdown                        1.17.0-4ubuntu0.1
  ruby-kramdown                   1.17.0-4ubuntu0.1

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


Package Information:

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