Vulnerability identifier: #VU40390

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-8474

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Debian Linux
Operating systems & Components / Operating system
Redmine
Web applications / CRM systems

Vendor: Debian
Ruby

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

Open redirect vulnerability in the valid_back_url function in app/controllers/application_controller.rb in Redmine before 2.6.7, 3.0.x before 3.0.5, and 3.1.x before 3.1.1 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a crafted back_url parameter, as demonstrated by "@attacker.com," a different vulnerability than CVE-2014-1985. <a href="http://cwe.mitre.org/data/definitions/601.html">CWE-601: URL Redirection to Untrusted Site ('Open Redirect')</a>

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 7.0 - 8.0

Redmine: 2.5.1 - 8.0

---

External links
http://www.debian.org/security/2016/dsa-3529
http://www.redmine.org/news/101
http://www.securityfocus.com/bid/78625
http://github.com/redmine/redmine/commit/032f2c9be6520d9d1a1608aa4f1d5d1f184f2472
http://www.redmine.org/issues/19577

---

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.