PT-2021-19887 · Nextcloud+2 · Nextcloud Server+2

Rtod · Published 2021-07-12 · Updated 2022-10-25 · CVE-2021-32726

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/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 The issue concerns the handling of webauthn tokens in Nextcloud Server. In affected versions, webauthn tokens were not deleted after a user has been deleted. This could allow a previous user to gain access to an account if the username is reused.

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 Authentication

Weakness Enumeration

CWE-708

CWE-287

Related Identifiers

ALT-PU-2021-3108

ALT-PU-2021-3224

CVE-2021-32726

GHSA-6QR9-C846-J8MG

OPENSUSE-SU-2021:1068-1

OPENSUSE-SU-2021_1068-1

Affected Products

Alt Linux

Nextcloud Server

Suse

References · 35

• https://osv.dev/vulnerability/openSUSE-SU-2021:1068-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-32726 · Security Note
• https://security.gentoo.org/glsa/202208-17 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-32726 · Vendor Advisory
• https://github.com/nextcloud/server/pull/27532 · Note
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6qr9-c846-j8mg · Note
• https://bugzilla.suse.com/1181804 · Note
• https://bugzilla.suse.com/1188253 · Note
• https://t.me/cvenotify/34535 · Telegram Post
• https://suse.com/security/cve/CVE-2020-8295 · Note
• https://bugzilla.suse.com/1188250 · Note
• https://suse.com/security/cve/CVE-2021-32680 · Note
• https://suse.com/security/cve/CVE-2021-32703 · Note
• https://suse.com/security/cve/CVE-2021-32726 · Note
• https://suse.com/security/cve/CVE-2021-32741 · Note