PublicDateAtUSN: 2020-06-16 22:15:00 UTC
Candidate: CVE-2020-4054
PublicDate: 2020-06-16 22:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4054
 https://github.com/rgrove/sanitize/security/advisories/GHSA-p4x4-rw2p-8j8m
 https://github.com/rgrove/sanitize/commit/a11498de9e283cd457b35ee252983662f7452aa9
 https://github.com/rgrove/sanitize/releases/tag/v5.2.1
 https://ubuntu.com/security/notices/USN-4543-1
Description:
 In Sanitize (RubyGem sanitize) greater than or equal to 3.0.0 and less than
 5.2.1, there is a cross-site scripting vulnerability. When HTML is
 sanitized using Sanitize's "relaxed" config, or a custom config that allows
 certain elements, some content in a math or svg element may not be
 sanitized correctly even if math and svg are not in the allowlist. You are
 likely to be vulnerable to this issue if you use Sanitize's relaxed config
 or a custom config that allows one or more of the following HTML elements:
 iframe, math, noembed, noframes, noscript, plaintext, script, style, svg,
 xmp. Using carefully crafted input, an attacker may be able to sneak
 arbitrary HTML through Sanitize, potentially resulting in XSS (cross-site
 scripting) or other undesired behavior when that HTML is rendered in a
 browser. This has been fixed in 5.2.1.
Ubuntu-Description:
Notes:
Mitigation:
Bugs:
Priority: medium
Discovered-by:
Assigned-to:
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L [7.3 HIGH]


Patches_ruby-sanitize:
upstream_ruby-sanitize: needs-triage
precise/esm_ruby-sanitize: DNE
trusty_ruby-sanitize: ignored (out of standard support)
trusty/esm_ruby-sanitize: DNE
xenial_ruby-sanitize: ignored (end of standard support, was needs-triage)
bionic_ruby-sanitize: needs-triage
eoan_ruby-sanitize: ignored (reached end-of-life)
focal_ruby-sanitize: released (4.6.6-2.1~0.20.04.1)
groovy_ruby-sanitize: not-affected (4.6.6-2.1)
hirsute_ruby-sanitize: not-affected (4.6.6-2.1)
impish_ruby-sanitize: not-affected (4.6.6-2.1)
jammy_ruby-sanitize: not-affected (4.6.6-2.1)
devel_ruby-sanitize: not-affected (4.6.6-2.1)