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Vulnerability Details : CVE-2015-8542

An issue was discovered in Open-Xchange Guard before 2.2.0-rev8. The "getprivkeybyid" API call is used to download a PGP Private Key for a specific user after providing authentication credentials. Clients provide the "id" and "cid" parameter to specify the current user by its user- and context-ID. The "auth" parameter contains a hashed password string which gets created by the client by asking the user to enter his or her OX Guard password. This parameter is used as single point of authentication when accessing PGP Private Keys. In case a user has set the same password as another user, it is possible to download another user's PGP Private Key by iterating the "id" and "cid" parameters. This kind of attack would also be able by brute-forcing login credentials, but since the "id" and "cid" parameters are sequential they are much easier to predict than a user's login name. At the same time, there are some obvious insecure standard passwords that are widely used. A attacker could send the hashed representation of typically weak passwords and randomly fetch Private Key of matching accounts. The attack can be executed by both internal users and "guests" which use the external mail reader.
Publish Date : 2016-12-15 Last Update Date : 2018-10-19
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- CVSS Scores & Vulnerability Types

CVSS Score
4.0
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Single system (The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).)
Gained Access None
Vulnerability Type(s)
CWE ID 320

- Products Affected By CVE-2015-8542

# Product Type Vendor Product Version Update Edition Language
1 Application Open-xchange Ox Guard 2.2.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Open-xchange Ox Guard 1

- References For CVE-2015-8542

http://www.securitytracker.com/id/1035174
SECTRACK 1035174
http://packetstormsecurity.com/files/136069/Open-Xchange-Guard-2.2.0-2.0-Private-Key-Disclosure.html CONFIRM
http://www.securityfocus.com/archive/1/537678/100/0/threaded
BUGTRAQ 20160302 Open-Xchange Security Advisory 2016-03-02

- Metasploit Modules Related To CVE-2015-8542

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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