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Vulnerability Details :

CVE-2023-28998

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-04 Apr, 2023 | 12:45
Updated At-11 Feb, 2025 | 15:31
Rejected At-
Credits

Nextcloud Desktop client misbehaves with E2EE when the server returns empty list of metadata keys

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 gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files.​ Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:04 Apr, 2023 | 12:45
Updated At:11 Feb, 2025 | 15:31
Rejected At:
▼CVE Numbering Authority (CNA)
Nextcloud Desktop client misbehaves with E2EE when the server returns empty list of metadata keys

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 gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files.​ Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

Affected Products
Vendor
Nextcloud GmbHnextcloud
Product
security-advisories
Versions
Affected
  • >= 3.0.0, < 3.6.5
Problem Types
TypeCWE IDDescription
CWECWE-325CWE-325: Missing Cryptographic Step
Type: CWE
CWE ID: CWE-325
Description: CWE-325: Missing Cryptographic Step
Metrics
VersionBase scoreBase severityVector
3.16.7MEDIUM
CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Version: 3.1
Base score: 6.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr
x_refsource_CONFIRM
https://github.com/nextcloud/desktop/pull/5323
x_refsource_MISC
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
x_refsource_MISC
Hyperlink: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/nextcloud/desktop/pull/5323
Resource:
x_refsource_MISC
Hyperlink: https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
1. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr
x_refsource_CONFIRM
x_transferred
https://github.com/nextcloud/desktop/pull/5323
x_refsource_MISC
x_transferred
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://github.com/nextcloud/desktop/pull/5323
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
Resource:
x_refsource_MISC
x_transferred
2. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:04 Apr, 2023 | 13:15
Updated At:07 Nov, 2023 | 04:10

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 gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files.​ Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.16.1MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
Secondary3.16.7MEDIUM
CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Type: Primary
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 6.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
CPE Matches
Nextcloud GmbH
nextcloud
>>desktop>>Versions from 3.0.0(inclusive) to 3.6.5(exclusive)
cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-325Primarysecurity-advisories@github.com
CWE ID: CWE-325
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdfsecurity-advisories@github.com
Exploit
Technical Description
Third Party Advisory
https://github.com/nextcloud/desktop/pull/5323security-advisories@github.com
Patch
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgrsecurity-advisories@github.com
Vendor Advisory
Hyperlink: https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
Source: security-advisories@github.com
Resource:
Exploit
Technical Description
Third Party Advisory
Hyperlink: https://github.com/nextcloud/desktop/pull/5323
Source: security-advisories@github.com
Resource:
Patch
Vendor Advisory
Hyperlink: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr
Source: security-advisories@github.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

Similar CVEs

2Records found
CVE-2023-28997
Matching Score-8
Assigner-GitHub, Inc.
ShareView Details
Matching Score-8
Assigner-GitHub, Inc.
CVSS Score-6.7||MEDIUM
EPSS-0.89% / 74.59%
||
7 Day CHG~0.00%
Published-04 Apr, 2023 | 12:42
Updated-11 Feb, 2025 | 15:32
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Nextcloud Desktop: Initialization vector reuse in E2EE allows malicious server admin to break, manipulate, access files

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.

Action-Not Available
Vendor-Nextcloud GmbH
Product-desktopsecurity-advisories
CWE ID-CWE-323
Reusing a Nonce, Key Pair in Encryption
CVE-2023-28999
Matching Score-6
Assigner-GitHub, Inc.
ShareView Details
Matching Score-6
Assigner-GitHub, Inc.
CVSS Score-6.9||MEDIUM
EPSS-0.24% / 47.36%
||
7 Day CHG~0.00%
Published-04 Apr, 2023 | 12:51
Updated-11 Feb, 2025 | 16:32
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Nextcloud: Lack of authenticity of metadata keys allows a malicious server to gain access to E2EE folders

Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files.​ This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.

Action-Not Available
Vendor-Nextcloud GmbH
Product-desktopnextcloudsecurity-advisories
CWE ID-CWE-325
Missing Cryptographic Step
CWE ID-CWE-311
Missing Encryption of Sensitive Data
Details not found