CVE-2023-28999 — Missing Cryptographic Step in Desktop

CWE-325 — Missing Cryptographic Step CWE-311 — Missing Encryption of Sensitive Data4 documents4 sources

Severity

6.4MEDIUMNVD

CNA6.9

EPSS

1.1%

top 21.70%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Nextcloud Desktop Nextcloud Nextcloud Security-advisories

Timeline

PublishedApr 4

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:LExploitability: 0.9 | Impact: 5.5

Affected Packages3 packages

▶NVDnextcloud/desktop3.0.0 — 3.8.0

▶NVDnextcloud/nextcloud3.0.5 — 4.8.0+1

▶CVEListV5nextcloud/security-advisories>= 3.0.0, < 3.8.0, >= 3.0.5, < 4.8.0, >= 3.13.0, < 3.25.0+2

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

OSV

CVE-2023-28999: Nextcloud is an open-source productivity platform↗2023-04-04

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CVEList

Nextcloud: Lack of authenticity of metadata keys allows a malicious server to gain access to E2EE folders↗2023-04-04

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📋Vendor Advisories

Debian

CVE-2023-28999: nextcloud-desktop - Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3...↗2023

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