Nextcloud Desktop Client up to 3.6.4 Encrypted File nonce re-use

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Nextcloud Desktop Client up to 3.6.4. It has been rated as problematic. The impacted element is an unknown function of the component Encrypted File Handler. Performing a manipulation results in nonce re-use. This vulnerability is reported as CVE-2023-28997. The attack may be carried out on the physical device. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in Nextcloud Desktop Client up to 3.6.4 (Cloud Software). This affects an unknown function of the component Encrypted File Handler. The manipulation with an unknown input leads to a nonce re-use vulnerability. CWE is classifying the issue as CWE-323. Nonces should be used for the present occasion and only once. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed 04/04/2023 as GHSA-4p33-rw27-j5fc. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2023-28997 since 03/29/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 265376 (Debian dla-4303 : caja-nextcloud - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.6.5 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (265376). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.6

VulDB Base Score: 3.6
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 6.7
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Nonce re-use
CWE: CWE-323
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 265376
Nessus Name: Debian dla-4303 : caja-nextcloud - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Desktop Client 3.6.5
Patch: github.com

Timelineinfo

03/29/2023 🔍
04/04/2023 +6 days 🔍
04/04/2023 +0 days 🔍
09/20/2025 +900 days 🔍

Sourcesinfo

Advisory: GHSA-4p33-rw27-j5fc
Status: Confirmed

CVE: CVE-2023-28997 (🔍)
GCVE (CVE): GCVE-0-2023-28997
GCVE (VulDB): GCVE-100-224847

Entryinfo

Created: 04/04/2023 15:35
Updated: 09/20/2025 16:38
Changes: 04/04/2023 15:35 (52), 04/21/2023 20:46 (11), 09/20/2025 16:38 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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