PT-2023-22074 · Nextcloud+2 · Nextcloud Desktop Client+2

Daniele Coppola + 3 · Published 2023-04-04 · Updated 2023-08-30 · CVE-2023-28998

Positive Technologies (AI Summary)

CVSS v3.1

6.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Nextcloud Desktop Client versions 3.0.0 through 3.6.4

Description A malicious server administrator can gain full access to an end-to-end encrypted folder, allowing them to decrypt files, recover the folder structure, and add new files.

Recommendations For Nextcloud Desktop Client versions 3.0.0 through 3.6.4, upgrade to version 3.6.5 to receive a patch.

Exploit

Fix

Weakness Enumeration

CWE-325

Related Identifiers

ALT-PU-2023-2019

ALT-PU-2023-4584

ALT-PU-2023-5197

CVE-2023-28998

GHSA-JH3G-WPWV-CQGR

Affected Products

Alt Linux

Debian

Nextcloud Desktop Client

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28998.json · Exploit
• 🔥 https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf · Exploit
• https://github.com/nextcloud/desktop/pull/5323 · Vendor Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-28998 · Security Note
• https://osv.dev/vulnerability/CVE-2023-28998 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-28998 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-28998 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-28998 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-28998 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-28998 · Vendor Advisory
• https://t.me/cibsecurity/61394 · Telegram Post