Multiple vulnerabilities in Nextcloud Server and Enterprise Server



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2023-48303
CVE-2023-48305
CWE-ID CWE-284
CWE-312
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Nextcloud Server
Client/Desktop applications / Messaging software

Nextcloud Enterprise Server
Client/Desktop applications / Messaging software

Vendor Nextcloud

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU83357

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-48303

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote administrator can change authentication details of user configured external storage.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nextcloud Server: 25.0.0 - 27.0.2

Nextcloud Enterprise Server: 25.0.0 - 27.0.2

CPE2.3 External links

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2448-44rp-c7hh


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Cleartext storage of sensitive information

EUVDB-ID: #VU83358

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-48305

CWE-ID: CWE-312 - Cleartext Storage of Sensitive Information

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the log level is set to debug the user_ldap app logged user passwords in plaintext into the log file. A local administrator can gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nextcloud Server: 25.0.0 - 27.1.3

Nextcloud Enterprise Server: 25.0.0 - 27.0.2

CPE2.3 External links

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-35p6-4992-w5fr


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###