CVE Catalog

CVE-2015-8542

High
Published: Translated: NVD NIST

Summary

An issue exists in Open-Xchange Guard before version 2.2.0-rev8 with the 'getprivkeybyid' API, which allows downloading a PGP Private Key for a specific user after providing authentication credentials. It is possible to download another user's key if passwords are identical, creating a risk of unauthorized access.

Risk Assessment

The organization may be exposed to unauthorized access to users' private PGP keys, potentially leading to the leakage of sensitive information. Attackers could exploit this vulnerability to gain access to other users' data.

Recommendation

It is recommended to update Open-Xchange Guard to version 2.2.0-rev8 or later and implement a policy enforcing unique passwords for each user to minimize risk.

Related vulnerabilities

Original NVD description (English source)

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

Vulnerability data from NVD (NIST) · CISA KEV · EPSS