PT-2021-15263 · Nextcloud · Nextcloud End-To-End Encryption

Rtod · Published 2021-06-11 · Updated 2022-10-25 · CVE-2021-22906

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Nextcloud End-to-End Encryption versions prior to 1.5.3 Nextcloud End-to-End Encryption versions prior to 1.6.3 Nextcloud End-to-End Encryption versions prior to 1.7.1

Description The issue allows any authenticated user to lock files of other users, resulting in a denial of service.

Recommendations For versions prior to 1.5.3, update to version 1.5.3 or later. For versions prior to 1.6.3, update to version 1.6.3 or later. For versions prior to 1.7.1, update to version 1.7.1 or later.

Exploit

Fix

IDOR

Resource Exhaustion

Weakness Enumeration

CWE-639

CWE-400

Related Identifiers

CVE-2021-22906

GHSA-3829-45WM-WW36

Affected Products

Nextcloud End-To-End Encryption

References · 4

• 🔥 https://hackerone.com/reports/1189174 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-22906 · Security Note
• https://osv.dev/vulnerability/CVE-2021-22906 · Vendor Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3829-45wm-ww36 · Note