A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by a vulnerability that has been acknowledged by the vendor but will not be patched.

  - xdg-utils: local file inclusion vulnerability (CVE-2020-27748)

Note that Nessus has not tested for this issue but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The version of xdg-utils installed on the remote host is prior to 1.1.0-0.17.20120809git. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2002 advisory.

  - A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs,     xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An     attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new     email. If a victim user does not notice that an attachment was added and sends the email, this could     result in sensitive information disclosure. It has been confirmed that the code behind this issue is in     xdg-email and not in Thunderbird. (CVE-2020-27748)

  - When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to     additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can     use this method to create a mailto URL that looks safe to users, but will actually attach files when     clicked. (CVE-2022-4055)

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-007 advisory.

  - A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs,     xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An     attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new     email. If a victim user does not notice that an attachment was added and sends the email, this could     result in sensitive information disclosure. It has been confirmed that the code behind this issue is in     xdg-email and not in Thunderbird. (CVE-2020-27748)

  - When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to     additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can     use this method to create a mailto URL that looks safe to users, but will actually attach files when     clicked. (CVE-2022-4055)

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

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4649-1 advisory.

    Jens Mueller discovered that xdg-utils incorrectly handled certain URI. An attacker could possibly use     this issue to expose sensitive information.

Tenable has extracted the preceding description block directly from the Ubuntu 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
199171	RHEL 8 : xdg-utils (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
196503	RHEL 7 : xdg-utils (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	high
196383	RHEL 6 : xdg-utils (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	high
173234	Amazon Linux 2 : xdg-utils (ALAS-2023-2002)	Nessus	Amazon Linux Local Security Checks	high
173127	Amazon Linux 2023 : xdg-utils (ALAS2023-2023-007)	Nessus	Amazon Linux Local Security Checks	high
143268	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : xdg-utils vulnerability (USN-4649-1)	Nessus	Ubuntu Local Security Checks	medium

Detections

Analytics

CVE-2020-27748

medium

Tenable Plugins

medium

high

high

high

high

medium