CVE-2016-4028
Published on: 12/15/2016 12:00:00 AM UTC
Last Modified on: 03/23/2021 11:26:58 PM UTC
Certain versions of Ox Guard from Open-xchange contain the following vulnerability:
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.
- CVE-2016-4028 has been assigned by
[email protected] to track the vulnerability - currently rated as HIGH severity.
CVSS3 Score: 7.5 - HIGH
Attack Vector ⓘ |
Attack Complexity |
Privileges Required |
User Interaction |
|
---|---|---|---|---|
NETWORK | HIGH | LOW | NONE | |
Scope | Confidentiality Impact |
Integrity Impact |
Availability Impact |
|
UNCHANGED | HIGH | HIGH | HIGH |
CVSS2 Score: 3.5 - LOW
Access Vector ⓘ |
Access Complexity |
Authentication |
---|---|---|
NETWORK | MEDIUM | SINGLE |
Confidentiality Impact |
Integrity Impact |
Availability Impact |
PARTIAL | NONE | NONE |
CVE References
Description | Tags ⓘ | Link |
---|---|---|
SecurityFocus | www.securityfocus.com text/html |
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Open-Xchange Guard Error Code Response Lets Remote Authenticated Users Obtain Authentication Information - SecurityTracker | Third Party Advisory VDB Entry www.securitytracker.com text/html |
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Known Affected Configurations (CPE V2.3)
Type | Vendor | Product | Version | Update | Edition | Language |
---|---|---|---|---|---|---|
Application | Open-xchange | Ox Guard | All | rev7 | All | All |
- cpe:2.3:a:open-xchange:ox_guard:*:rev7:*:*:*:*:*:*: