PT-2023-22075 · Nextcloud+2 · Nextcloud Ios App+4

Daniele Coppola + 3 · Published 2023-04-04 · Updated 2023-08-30 · CVE-2023-28999

Positive Technologies (AI Summary)

CVSS v3.1

6.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Nextcloud Desktop client versions 3.0.0 through 3.8.0 Nextcloud Android app versions 3.13.0 through 3.25.0 Nextcloud iOS app versions 3.0.5 through 4.8.0

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 3.7.0, update to version 3.8.0. For Nextcloud Android app versions 3.13.0 through 3.24.0, update to version 3.25.0. For Nextcloud iOS app versions 3.0.5 through 4.7.0, update to version 4.8.0.

Exploit

Fix

Missing Encryption of Sensitive Data

Weakness Enumeration

CWE-325

CWE-311

Related Identifiers

ALT-PU-2023-2019

ALT-PU-2023-4584

ALT-PU-2023-5197

CVE-2023-28999

GHSA-8875-WXWW-3RR8

Affected Products

Alt Linux

Debian

Nextcloud Android App

Nextcloud Desktop Client

Nextcloud Ios App

References · 45

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28999.json · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39331.json · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39334.json · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39333.json · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39332.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/5560 · Vendor Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-28999 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22879 · Security Note
• https://osv.dev/vulnerability/CVE-2023-28999 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-28999 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-28999 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-39332 · Security Note
• https://ubuntu.com/security/CVE-2023-28999 · Vendor Advisory