#VU27295 Open redirect in mod_auth_mellon - CVE-2019-13038

Vulnerability identifier: #VU27295

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13038

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
mod_auth_mellon
Server applications / Other server solutions

Vendor: UNINETT

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data passed via the "ogin?ReturnTo=" string. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

mod_auth_mellon: 0.4.0 - 0.14.2

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External links
https://github.com/Uninett/mod_auth_mellon/issues/35#issuecomment-503974885
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5E3JVHURJJNDP63CKVX5O5MJAGCQV4K/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XU5GVFZW3C2M4ZBL4F7UP7N24FNUCX4E/

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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.