CVE-2023-28997 Nextcloud Desktop: Initialization vector reuse in E2EE allows malicious server admin to break, manipulate, access files

2023-04-0412:42:24

CWE-323

GitHub_M

www.cve.org

nextcloud

desktop

e2ee

vulnerability

patch

update

server admin

file access

CVSS3

6.7

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

EPSS

0.001

Percentile

42.8%

JSON

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

CNA Affected

[
  {
    "vendor": "nextcloud",
    "product": "security-advisories",
    "versions": [
      {
        "version": ">= 3.0.0, < 3.6.5",
        "status": "affected"
      }
    ]
  }
]