Security Information / 2020 / Security Information -- DSA-4730-1 ruby-sanitize

Debian Security Advisory

DSA-4730-1 ruby-sanitize -- security update

Date Reported:

19 Jul 2020

Affected Packages:

ruby-sanitize

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 963808.
In Mitre's CVE dictionary: CVE-2020-4054.

More information:

Michal Bentkowski discovered that ruby-sanitize, a whitelist-based HTML sanitizer, is prone to a HTML sanitization bypass vulnerability when using the relaxed or a custom config allowing certain elements. Content in a <math> or <svg> element may not be sanitized correctly even if math and svg are not in the allowlist.

For the stable distribution (buster), this problem has been fixed in version 4.6.6-2.1~deb10u1.

We recommend that you upgrade your ruby-sanitize packages.

For the detailed security status of ruby-sanitize please refer to its security tracker page at: https://security-tracker.debian.org/tracker/ruby-sanitize