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Debian LTS Advisory DLA-3652-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                           Chris Lamb
November 14, 2023                             https://wiki.debian.org/LTS
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Package        : ruby-sanitize
Version        : 4.6.6-2.1~deb10u2
CVE ID         : CVE-2023-36823
Debian Bug     : 1041430

It was discovered that there was a potential cross-site scripting
(XSS) in ruby-sanitize, a whitelist-based HTML sanitizer.

Using carefully crafted input, an attacker may have be able to sneak
arbitrary HTML and CSS through Sanitize when configured to use the
built-in "relaxed" config or when using a custom config that allowed
"style" elements and one or more CSS "at"-rules. This could have
resulted in cross-site scripting (XSS) or other undesired behavior
if the malicious HTML and CSS were then rendered in a browser. 

For Debian 10 buster, this problem has been fixed in version
4.6.6-2.1~deb10u2.

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/source-package/ruby-sanitize

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS