Flysystem is an open source file storage library for PHP. The whitespace normalisation using in 1.x and 2.x removes any unicode whitespace. Under certain specific conditions this could potentially allow a malicious user to execute code remotely. The conditions are: A user is allowed to supply the path or filename of an uploaded file, the supplied path or filename is not checked against unicode chars, the supplied pathname checked against an extension deny-list, not an allow-list, the supplied path or filename contains a unicode whitespace char in the extension, the uploaded file is stored in a directory that allows PHP code to be executed. Given these conditions are met a user can upload and execute arbitrary code on the system under attack. The unicode whitespace removal has been replaced with a rejection (exception). For 1.x users, upgrade to 1.1.4. For 2.x users, upgrade to 2.1.1.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Flysystem is an open source file storage library for PHP. The whitespace normalisation using in 1.x and     2.x removes any unicode whitespace. Under certain specific conditions this could potentially allow a     malicious user to execute code remotely. The conditions are: A user is allowed to supply the path or     filename of an uploaded file, the supplied path or filename is not checked against unicode chars, the     supplied pathname checked against an extension deny-list, not an allow-list, the supplied path or filename     contains a unicode whitespace char in the extension, the uploaded file is stored in a directory that     allows PHP code to be executed. Given these conditions are met a user can upload and execute arbitrary     code on the system under attack. The unicode whitespace removal has been replaced with a rejection     (exception). For 1.x users, upgrade to 1.1.4. For 2.x users, upgrade to 2.1.1. (CVE-2021-32708)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Flysystem is an open source file storage library for PHP. The whitespace normalisation using in 1.x and
    2.x removes any unicode whitespace. Under certain specific conditions this could potentially allow a
    malicious user to execute code remotely. The conditions are: A user is allowed to supply the path or
    filename of an uploaded file, the supplied path or filename is not checked against unicode chars, the
    supplied pathname checked against an extension deny-list, not an allow-list, the supplied path or filename
    contains a unicode whitespace char in the extension, the uploaded file is stored in a directory that
    allows PHP code to be executed. Given these conditions are met a user can upload and execute arbitrary
    code on the system under attack. The unicode whitespace removal has been replaced with a rejection
    (exception). For 1.x users, upgrade to 1.1.4. For 2.x users, upgrade to 2.1.1. (CVE-2021-32708)

ID	Name	Product	Family	Severity
257279	Linux Distros Unpatched Vulnerability : CVE-2021-32708	Nessus	Misc.	high
413233	SCA: security update for league/flysystem (GHSA-9f46-5r25-5wfm)	Tenable Cloud Security	SCA Checks	high
413233	SCA: security update for league/flysystem (GHSA-9f46-5r25-5wfm)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

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CVE-2021-32708

high

Tenable Plugins

high

high

high