PT-2021-19857 · Nextcloud+2 · Nextcloud Server+2

Rtod · Published 2021-07-12 · Updated 2022-10-26 · CVE-2021-32688

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions prior to 19.0.13 Nextcloud Server versions prior to 20.0.11 Nextcloud Server versions prior to 21.0.3

Description Nextcloud Server is a package that handles data storage and supports application-specific tokens for authentication purposes. These tokens are granted to specific applications and can be configured by the user to not have any filesystem access. However, due to a lacking permission check, the tokens were able to change their own permissions, allowing filesystem limited tokens to grant themselves access to the filesystem.

Recommendations For versions prior to 19.0.13, update to version 19.0.13 or later. For versions prior to 20.0.11, update to version 20.0.11 or later. For versions prior to 21.0.3, update to version 21.0.3 or later.

Fix

Improper Authorization

Files Accessible to External Parties

Weakness Enumeration

CWE-285

CWE-552

Related Identifiers

ALT-PU-2021-3108

ALT-PU-2021-3224

CVE-2021-32688

GHSA-48M7-7R2R-838R

OPENSUSE-SU-2021:1068-1

OPENSUSE-SU-2021_1068-1

Affected Products

Alt Linux

Nextcloud Server

Suse

References · 39

• https://github.com/nextcloud/server/pull/27000 · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2021:1068-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-32688 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ · Vendor Advisory
• https://security.gentoo.org/glsa/202208-17 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-32688 · Security Note
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r · Note
• https://bugzilla.suse.com/1188256 · Note
• https://suse.com/security/cve/CVE-2021-32726 · Note
• https://t.me/cvenotify/17982 · Telegram Post
• https://suse.com/security/cve/CVE-2020-8294 · Note
• https://bugzilla.suse.com/1181804 · Note
• https://suse.com/security/cve/CVE-2021-32680 · Note
• https://suse.com/security/cve/CVE-2021-32725 · Note