Multiple vulnerabilities in ownCloud Server



Published: 2021-08-04
Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2021-35946
CVE-2021-35947
CVE-2021-35948
CVE-2021-35949
CWE-ID CWE-264
CWE-200
CWE-384
CWE-424
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 4 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU55561

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-35946

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to escalate privileges on the system.

The vulnerability exists due to the federated share recipient can increase permissions, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 10.0 - 10.7.0


CPE2.3 External links

http://owncloud.com/security-advisories/cve-2021-35946/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Information disclosure

EUVDB-ID: #VU55564

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-35947

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote authenticated attacker can display the internal path and username of the share owner.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 10.0 - 10.7.0


CPE2.3 External links

http://owncloud.com/security-advisories/cve-2021-35947/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Session Fixation

EUVDB-ID: #VU55563

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-35948

CWE-ID: CWE-384 - Session Fixation

Exploit availability: No

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to the session cookies are not reset after authenticating for public linkse. A remote attacker can obtain sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 10.0 - 10.7.0


CPE2.3 External links

http://owncloud.com/security-advisories/cve-2021-35948/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Improper Protection of Alternate Path

EUVDB-ID: #VU55562

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-35949

CWE-ID: CWE-424 - Improper Protection of Alternate Path

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerabiity exists due to the permission check for a file drop can be circumvented by using the shareinfo API. A remote authenticated attacker can see the files in the filedrop.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 10.0 - 10.7.0


CPE2.3 External links

http://owncloud.com/security-advisories/cve-2021-35949/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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