PT-2020-19969 · Nextcloud · Nextcloud Server

Published 2020-11-09 · Updated 2020-11-19 · CVE-2020-8133

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

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

Description A wrong generation of the passphrase for the encrypted block allowed an attacker to overwrite blocks in a file.

Recommendations For Nextcloud Server version 19.0.1, update to a version that fixes the issue with the passphrase generation for encrypted blocks.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

CWE-657

Related Identifiers

CVE-2020-8133

Affected Products

Nextcloud Server

References · 8

• 🔥 https://hackerone.com/reports/661051 · Exploit
• https://osv.dev/vulnerability/CVE-2020-8133 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8133 · Security Note
• https://t.me/cvenotify/5395 · Telegram Post
• https://t.me/cvenotify/5811 · Telegram Post
• https://t.me/cibsecurity/16027 · Telegram Post
• https://hackerone.com/reports/661051%2C · Note
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-038 · Note