Sanitize Gem up to 5.2.0 on Ruby SVG Element cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in Sanitize Gem up to 5.2.0 on Ruby. This issue affects some unknown processing. The manipulation as part of SVG Element results in cross site scripting. This vulnerability was named CVE-2020-4054. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Sanitize Gem up to 5.2.0 on Ruby (Ruby Gem). Affected is an unknown code block. The manipulation as part of a SVG Element leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

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.

The weakness was presented 06/16/2020 (GitHub Repository). The advisory is available at github.com. This vulnerability is traded as CVE-2020-4054 since 12/30/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 5.2.1 eliminates this vulnerability.

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Productinfo

Type

• Ruby Gem

Name

• Sanitize Gem

Version

• 5.0
• 5.1
• 5.2.0

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CPE 2.2info

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