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Vulnerability Details : CVE-2021-32688

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server supports application specific tokens for authentication purposes. These tokens are supposed to be granted to a specific applications (e.g. DAV sync clients), and can also be configured by the user to not have any filesystem access. Due to a lacking permission check, the tokens were able to change their own permissions in versions prior to 19.0.13, 20.0.11, and 21.0.3. Thus fileystem limited tokens were able to grant themselves access to the filesystem. The issue is patched in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds aside from upgrading.
Publish Date : 2021-07-12 Last Update Date : 2021-09-20
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 552

- Products Affected By CVE-2021-32688

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
3 Application Nextcloud Nextcloud Server * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 2
Nextcloud Nextcloud Server 1

- References For CVE-2021-32688

https://lists.fedoraproject.org/archives/list/[email protected]/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
FEDORA FEDORA-2021-6f327296fe
https://github.com/nextcloud/server/pull/27000
https://lists.fedoraproject.org/archives/list/[email protected]/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
FEDORA FEDORA-2021-9b421b78af
https://hackerone.com/reports/1193321
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r CONFIRM

- Metasploit Modules Related To CVE-2021-32688

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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