Privilege escalation in ownCloud



Published: 2019-07-29
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID N/A
CWE-ID CWE-269
Exploitation vector Network
Public exploit N/A
Vulnerable software
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ownCloud Server
Web applications / Modules and components for CMS

Vendor ownCloud

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper privilege management

EUVDB-ID: #VU19532

Risk: Medium

CVSSv3.1:

CVE-ID: N/A

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain elevated privileges.

The vulnerability exists due to the possibility to extend internal-share permissions using the API. A remote attacker can extend the permission of a received subfolder share using the ocs api and gain elevated privileges. Additional risk exists because the privileged extension is also possible on public-shares.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 1.0 - 10.2.0


CPE2.3 External links

http://owncloud.org/security/advisories/possibility-to-extend-internal-share-permissions-using-the-api/
http://github.com/owncloud/core/commit/c93eca49c32428ece03dd67042772d5fa62c8d6e

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Improper Privilege Management

EUVDB-ID: #VU19544

Risk: Medium

CVSSv3.1:

CVE-ID: N/A

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain elevated privileges.

The vulnerability exists due to the possibility to extend internal-share permissions using the API. A remote authenticated attacker can extend the permission of a received internal-share using the ocs-api and gain elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 1.0 - 10.2.0


CPE2.3 External links

http://owncloud.org/security/advisories/possibility-to-extend-internal-share-permissions-using-the-api2/
http://github.com/owncloud/core/commit/4ae39f7c70bb26e55d7396184da5c30dd75980a3

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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