Vulnerability identifier: #VU83565
Vulnerability risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-284
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
oauth2
Universal components / Libraries /
Programming Languages & Components
Vendor: ownCloud
Description
The vulnerability allows a remote attacker to bypass subdomain validation.
The vulnerability exists due to improper access restrictions when Allow Subdomains is enabled. A remote attacker can pass in a specially crafted redirect-url which bypasses the validation code and thus allows the attacker to redirect callbacks to a TLD controlled by the attacker.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
oauth2: 0.1.0 - 0.6.0
External links
http://owncloud.com/security-advisories/subdomain-validation-bypass/
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.