Description

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.

INFO

Published Date :

June 24, 2021, 5:15 p.m.

Last Modified :

Nov. 7, 2023, 3:35 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2021-32708 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-32708 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fedoraproject fedora
1 Thephpleague flysystem

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Affected versions of this package are vulnerable to Race Condition. 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.

Python

Updated: 3 weeks, 4 days ago
0 stars 0 fork 0 watcher
Born at : Oct. 19, 2024, 12:49 p.m. This repo has been linked 1 different CVEs too.

Clones a Github repository with PHP & ZipArchive. Without using Git or exec().

composer-library github php zipfile

PHP Dockerfile

Updated: 1 year, 2 months ago
8 stars 2 fork 2 watcher
Born at : Aug. 7, 2017, 1:07 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-32708 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-32708 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNZSWK4GOMJOOHKLZEOE5AQSLC4DNCRZ/ [No types assigned]
    Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NWPTENBYKI2IG47GI4DHAACLNRLTWUR5/ [No types assigned]
    Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/RNZSWK4GOMJOOHKLZEOE5AQSLC4DNCRZ/
    Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/NWPTENBYKI2IG47GI4DHAACLNRLTWUR5/
  • Modified Analysis by [email protected]

    Sep. 20, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/NWPTENBYKI2IG47GI4DHAACLNRLTWUR5/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/NWPTENBYKI2IG47GI4DHAACLNRLTWUR5/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RNZSWK4GOMJOOHKLZEOE5AQSLC4DNCRZ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RNZSWK4GOMJOOHKLZEOE5AQSLC4DNCRZ/ Mailing List, Third Party Advisory
    Added CWE NIST CWE-367
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 04, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RNZSWK4GOMJOOHKLZEOE5AQSLC4DNCRZ/ [No Types Assigned]
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/NWPTENBYKI2IG47GI4DHAACLNRLTWUR5/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 01, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/thephpleague/flysystem/commit/a3c694de9f7e844b76f9d1b61296ebf6e8d89d74 No Types Assigned https://github.com/thephpleague/flysystem/commit/a3c694de9f7e844b76f9d1b61296ebf6e8d89d74 Patch, Third Party Advisory
    Changed Reference Type https://github.com/thephpleague/flysystem/commit/f3ad69181b8afed2c9edf7be5a2918144ff4ea32 No Types Assigned https://github.com/thephpleague/flysystem/commit/f3ad69181b8afed2c9edf7be5a2918144ff4ea32 Patch, Third Party Advisory
    Changed Reference Type https://github.com/thephpleague/flysystem/security/advisories/GHSA-9f46-5r25-5wfm No Types Assigned https://github.com/thephpleague/flysystem/security/advisories/GHSA-9f46-5r25-5wfm Patch, Third Party Advisory
    Changed Reference Type https://packagist.org/packages/league/flysystem No Types Assigned https://packagist.org/packages/league/flysystem Product, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:thephpleague:flysystem:*:*:*:*:*:*:*:* versions from (including) 1.0.0 up to (excluding) 1.1.4 *cpe:2.3:a:thephpleague:flysystem:*:*:*:*:*:*:*:* versions from (including) 2.0.0 up to (excluding) 2.1.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-32708 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-32708 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.71 }} 0.05%

score

0.79903

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability