CVE-2023-28997
Nextcloud Desktop: Initialization vector reuse in E2EE allows malicious server admin to break, manipulate, access files
Severity Score
6.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track*
*SSVC
Descriptions
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.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track*
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2023-03-29 CVE Reserved
- 2023-04-04 CVE Published
- 2025-02-11 CVE Updated
- 2025-02-11 First Exploit
- 2025-07-11 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-323: Reusing a Nonce, Key Pair in Encryption
CAPEC
References (3)
URL | Tag | Source |
---|
URL | Date | SRC |
---|---|---|
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf | 2025-02-11 |
URL | Date | SRC |
---|---|---|
https://github.com/nextcloud/desktop/pull/5324 | 2023-04-10 |
URL | Date | SRC |
---|---|---|
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc | 2023-04-10 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Nextcloud Search vendor "Nextcloud" | Desktop Search vendor "Nextcloud" for product "Desktop" | >= 3.0.0 < 3.6.5 Search vendor "Nextcloud" for product "Desktop" and version " >= 3.0.0 < 3.6.5" | - |
Affected
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