PT-2023-8432 · Nextcloud+2 · Nextcloud Enterprise Server+3

Retr02332 · Published 2023-11-21 · Updated 2025-01-24 · CVE-2023-48306

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions 25.0.0 through 25.0.10 Nextcloud Server versions 26.0.0 through 26.0.5 Nextcloud Server versions prior to 27.1.0 Nextcloud Enterprise Server versions 22.0.0 through 22.2.10.15 Nextcloud Enterprise Server versions 23.0.0 through 23.0.12.10 Nextcloud Enterprise Server versions 24.0.0 through 24.0.12.6 Nextcloud Enterprise Server versions prior to 25.0.11 Nextcloud Enterprise Server versions 26.0.0 through 26.0.5 Nextcloud Enterprise Server versions prior to 27.1.0

Description The issue is related to insufficient validation of incoming requests in Nextcloud Server, allowing an attacker to perform a Server-Side Request Forgery (SSRF) attack through DNS rebinding. This vulnerability affects Nextcloud Server and Nextcloud Enterprise Server, enabling a remote attacker to exploit it.

Recommendations For Nextcloud Server versions 25.0.0 through 25.0.10, update to version 25.0.11 or later. For Nextcloud Server versions 26.0.0 through 26.0.5, update to version 26.0.6 or later. For Nextcloud Server versions prior to 27.1.0, update to version 27.1.0. For Nextcloud Enterprise Server versions 22.0.0 through 22.2.10.15, update to version 22.2.10.16 or later. For Nextcloud Enterprise Server versions 23.0.0 through 23.0.12.10, update to version 23.0.12.11 or later. For Nextcloud Enterprise Server versions 24.0.0 through 24.0.12.6, update to version 24.0.12.7 or later. For Nextcloud Enterprise Server versions prior to 25.0.11, update to version 25.0.11 or later. For Nextcloud Enterprise Server versions 26.0.0 through 26.0.5, update to version 26.0.6 or later. For Nextcloud Enterprise Server versions prior to 27.1.0, update to version 27.1.0.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

ALT-PU-2023-7785

ALT-PU-2023-7786

ALT-PU-2024-1230

ALT-PU-2025-1855

BDU:2024-00716

CVE-2023-48306

GHSA-8F69-F9JG-4X3V

Affected Products

Alt Linux

Nextcloud Enterprise Server

Nextcloud Server

Red Os

References · 10

• 🔥 https://github.com/nextcloud/server/pull/40234 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48306.json · Exploit
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-00716 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-48306 · Security Note
• https://osv.dev/vulnerability/CVE-2023-48306 · Vendor Advisory
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://hackerone.com/reports/2115212 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-nextcloud-cve-2023-48301-cve-2023-48302 · Note
• https://t.me/cvenotify/61029 · Telegram Post