Privilege escalation in ownCloud
| 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 Subscribe |
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: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsownCloud Server: 1.0 - 10.2.0
External linkshttp://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?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Improper Privilege Management
EUVDB-ID: #VU19544
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
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.
Install updates from vendor's website.
Vulnerable software versionsownCloud Server: 1.0 - 10.2.0
External linkshttp://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?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
