PT-2020-19987 · Nextcloud+1 · Nextcloud Server+1

Published 2020-09-11 · Updated 2022-09-27 · CVE-2020-8152

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Nextcloud Server version 19.0.1

Description The issue is related to insufficient protection of server-side encryption keys, allowing an attacker to replace the public key and potentially decrypt them later. This could lead to an elevation of privilege.

Recommendations For Nextcloud Server version 19.0.1, update to a version that includes a fix for this issue to prevent exploitation. As a temporary workaround, consider restricting access to the server-side encryption keys to minimize the risk of exploitation.

Exploit

Fix

Insufficiently Protected Credentials

Weakness Enumeration

CWE-522

Related Identifiers

ALT-PU-2020-3060

CVE-2020-8152

Affected Products

Alt Linux

Nextcloud Server

References · 10

• 🔥 https://hackerone.com/reports/743505 · Exploit
• 🔥 http://seclists.org/fulldisclosure/2020/Dec/54 · Exploit
• https://osv.dev/vulnerability/CVE-2020-8152 · Vendor Advisory
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-040 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8152 · Security Note
• https://t.me/cvenotify/7755 · Telegram Post
• https://t.me/defcon_news/56805 · Telegram Post
• https://t.me/defcon_news/65163 · Telegram Post
• https://t.me/defcon_news/65166 · Telegram Post
• https://t.me/cvenotify/5586 · Telegram Post