A wkhtmltopdf security update has been released for Debian GNU/Linux 8 and 9 Extended LTS to address a directory traversal vulnerability.

ELA-691-1 wkhtmltopdf security update

Package wkhtmltopdf
Version 0.12.1-2+deb8u1 (jessie), 0.12.3.2-3+deb9u1 (stretch)
Related CVEs CVE-2020-21365

Directory traversal vulnerability in wkhtmltopdf, a set of CLI utilities to convert html to pdf or image using WebKit, allows remote attackers to read local files and disclose sensitive information via a crafted html file running with the default configurations.

Do note that it’s a breaking change, in the way that the local filesystem access will be blocked by default. In case you need to enable or allow it, use --enable-local-file-access. Another option would be to use --allow to specify the folder(s) from which local files are allowed to be loaded.

For Debian 8 jessie, these problems have been fixed in version 0.12.1-2+deb8u1.

For Debian 9 stretch, these problems have been fixed in version 0.12.3.2-3+deb9u1.

We recommend that you upgrade your wkhtmltopdf packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/

  ELA-691-1 wkhtmltopdf security update