[DRE-maint] Bug#965305: ruby-kramdown: CVE-2020-14001

[Salvatore Bonaccorso]

Source: ruby-kramdown
Version: 1.17.0-4
Severity: grave
Tags: security upstream
Justification: user security hole
X-Debbugs-Cc: Debian Security Team <team at security.debian.org>
Control: found -1 1.17.0-1

Hi,

The following vulnerability was published for ruby-kramdown.

CVE-2020-14001[0]:
| The kramdown gem before 2.3.0 for Ruby processes the template option
| inside Kramdown documents by default, which allows unintended read
| access (such as template="/etc/passwd") or unintended embedded Ruby
| code execution (such as a string that begins with
| template="string://<%= `). NOTE: kramdown is used in Jekyll, GitLab
| Pages, GitHub Pages, and Thredded Forum.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2020-14001
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14001
[1] https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore