Open-Xchange OX Guard up to 2.4.0-rev7 auth Padding credentials management

Summaryinfo

A vulnerability identified as critical has been detected in Open-Xchange OX Guard up to 2.4.0-rev7. This affects an unknown function. Performing a manipulation of the argument auth results in credentials management (Padding). This vulnerability is cataloged as CVE-2016-4028. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Open-Xchange OX Guard up to 2.4.0-rev7. This affects some unknown functionality. The manipulation of the argument auth with an unknown input leads to a credentials management vulnerability (Padding). CWE is classifying the issue as CWE-255. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Open-Xchange OX Guard before 2.4.0-rev8. OX Guard uses an authentication token to identify and transfer guest users credentials. The OX Guard API acts as a padding oracle by responding with different error codes depending on whether the provided token matches the encryption padding. In combination with AES-CBC, this allows attackers to guess the correct padding. Attackers may run brute-forcing attacks on the content of the guest authentication token and discover user credentials. For a practical attack vector, the guest users needs to have logged in, the content of the guest user's "OxReaderID" cookie and the value of the "auth" parameter needs to be known to the attacker.

The bug was discovered 06/22/2016. The weakness was shared 12/15/2016 (Website). The advisory is shared at securityfocus.com. This vulnerability is uniquely identified as CVE-2016-4028 since 04/15/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1552 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 176 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.4.0-rev8 eliminates this vulnerability.

The entries VDB-94507, VDB-94510, VDB-94511 and VDB-94512 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Open-Xchange

Name

• OX Guard

Version

• 2.4.0-rev7

License

• open-source

Website

• Vendor: https://www.open-xchange.com/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion