PT-2023-3557 · Nextcloud+2 · Nextcloud Server+3

Arianitisufi + 2 · Publicado 2023-06-23 · Atualizado 2025-01-24 · CVE-2023-35928

Positive Technologies (AI Summary)

CVSS v3.1

8.4

Alta

Vetor base

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

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions 25.0.0 through 25.0.7 Nextcloud Server versions 26.0.0 through 26.0.2 Nextcloud Enterprise Server versions 19.0.0 through 19.0.13.9 Nextcloud Enterprise Server versions 20.0.0 through 20.0.14.14 Nextcloud Enterprise Server versions 21.0.0 through 21.0.9.12 Nextcloud Enterprise Server versions 22.0.0 through 22.2.10.12 Nextcloud Enterprise Server versions 23.0.0 through 23.0.12.7 Nextcloud Enterprise Server versions 24.0.0 through 24.0.12.2 Nextcloud Enterprise Server versions 25.0.0 through 25.0.7 Nextcloud Enterprise Server versions 26.0.0 through 26.0.2

Description The issue is related to the external storage functionality at the user level, which can be used to collect login credentials of other users. This can allow a remote attacker to gain access to another user's account.

Recommendations For Nextcloud Server versions 25.0.0 through 25.0.7 and 26.0.0 through 26.0.2, update to version 25.0.7 or 26.0.2. For Nextcloud Enterprise Server versions 19.0.0 through 19.0.13.9, update to version 19.0.13.9. For Nextcloud Enterprise Server versions 20.0.0 through 20.0.14.14, update to version 20.0.14.14. For Nextcloud Enterprise Server versions 21.0.0 through 21.0.9.12, update to version 21.0.9.12. For Nextcloud Enterprise Server versions 22.0.0 through 22.2.10.12, update to version 22.2.10.12. For Nextcloud Enterprise Server versions 23.0.0 through 23.0.12.7, update to version 23.0.12.7. For Nextcloud Enterprise Server versions 24.0.0 through 24.0.12.2, update to version 24.0.12.2. For Nextcloud Enterprise Server versions 25.0.0 through 25.0.7, update to version 25.0.7. For Nextcloud Enterprise Server versions 26.0.0 through 26.0.2, update to version 26.0.2. As a temporary workaround, consider disabling the app files external. Change config setting "Allow users to mount external storage" to disabled in "Administration" > "External storage" settings /index.php/settings/admin/externalstorages. Change config setting to disallow users to create external storages in "Administration" > "External storage" settings /index.php/settings/admin/externalstorages with the types FTP, Nextcloud, SFTP, and/or WebDAV.

Exploit

Correção

Enumeração de Fraquezas

CWE-274

Identificadores relacionados

ALT-PU-2023-7785

ALT-PU-2025-1855

BDU:2023-03776

CVE-2023-35928

GHSA-637G-XP2C-QH5H

Produtos afetados

Alt Linux

Nextcloud Enterprise Server

Nextcloud Server

Red Os

Referências · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/35xxx/CVE-2023-35928.json · Exploit
• https://github.com/nextcloud/server/pull/38265 · Nota
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-637g-xp2c-qh5h · Aviso do Fabricante
• https://t.me/cvenotify/53002 · Publicação no Telegram
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-nextcloud-server-cve-2023-35172-cve-2023-35928 · Nota
• https://osv.dev/vulnerability/CVE-2023-35928 · Aviso do Fabricante
• https://bdu.fstec.ru/vul/2023-03776 · Nota de Segurança
• https://hackerone.com/reports/1978882 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2023-35928 · Nota de Segurança
• https://redos.red-soft.ru/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-nextcloud-server-cve-2023-35172-cve-2023-35928 · Nota
• https://t.me/cvenotify/52986 · Publicação no Telegram