Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version 6.0.2 when Sanitize is configured to use the built-in "relaxed" config or when using a custom config that allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `</` as `<\/` in `style` element content.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6748-1 advisory.

    It was discovered that Sanitize incorrectly handled noscript elements under certain circumstances. An     attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only     affected Ubuntu 22.04 LTS. (CVE-2023-23627)

    It was discovered that Sanitize incorrectly handled style elements under certain circumstances. An     attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. (CVE-2023-36823)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has a package installed that is affected by a vulnerability as referenced in the dsa-5616 advisory.

  - Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be     able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version     6.0.2 when Sanitize is configured to use the built-in relaxed config or when using a custom config that     allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other     undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs     additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to     upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a     Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `</` as     `<\/` in `style` element content. (CVE-2023-36823)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has a package installed that is affected by a vulnerability as referenced in the dla-3652 advisory.

    - -------------------------------------------------------------------------     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
    - -------------------------------------------------------------------------

    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/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

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
193803	Ubuntu 20.04 LTS / 22.04 LTS / 23.10 : Sanitize vulnerabilities (USN-6748-1)	Nessus	Ubuntu Local Security Checks	medium
190002	Debian dsa-5616 : ruby-sanitize - security update	Nessus	Debian Local Security Checks	medium
185522	Debian dla-3652 : ruby-sanitize - security update	Nessus	Debian Local Security Checks	medium

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