DomPDF before version 2.0.0 is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the file_get_contents() function. An attacker who can upload files of any type to the server can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution, especially when DOMPdf is used with frameworks with documented POP chains like Laravel or vulnerable developer code.

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6277-2 advisory.

    USN-6277-1 fixed vulnerabilities in Dompdf. This update provides the corresponding updates for Ubuntu     22.04 LTS.



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 Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6277-1 advisory.

    It was discovered that Dompdf was not properly validating untrusted input when processing HTML content     under certain circumstances. An attacker could possibly use this issue to expose sensitive information or     execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2014-5011, CVE-2014-5012,     CVE-2014-5013)

    It was discovered that Dompdf was not properly validating processed HTML content that referenced PHAR     files, which could result in the deserialization of untrusted data. An attacker could possibly use this     issue to execute arbitrary code. (CVE-2021-3838)

    It was discovered that Dompdf was not properly validating processed HTML content that referenced both a     remote base and a local file, which could result in the bypass of a chroot check. An attacker could     possibly use this issue to expose sensitive information. (CVE-2022-2400)

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 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3495 advisory.

  - External Control of File Name or Path in GitHub repository dompdf/dompdf prior to 2.0.0. (CVE-2022-2400)

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

ID	Name	Product	Family	Severity
179659	Ubuntu 22.04 LTS : Dompdf vulnerabilities (USN-6277-2)	Nessus	Ubuntu Local Security Checks	critical
179459	Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS : Dompdf vulnerabilities (USN-6277-1)	Nessus	Ubuntu Local Security Checks	critical
178290	Debian DLA-3495-1 : php-dompdf - LTS security update	Nessus	Debian Local Security Checks	critical

Detections

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CVE-2021-3838

critical

Tenable Plugins

critical

critical

critical