CVE-2016-4028
Open-Xchange OX Guard Padding Oracle Vulnerability
Description
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.
INFO
Published Date :
Dec. 15, 2016, 6:59 a.m.
Last Modified :
Oct. 19, 2018, 3:46 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
1.6
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2016-4028.
| URL | Resource |
|---|---|
| http://www.securityfocus.com/archive/1/538732/100/0/threaded | |
| http://www.securitytracker.com/id/1036154 | Third Party Advisory VDB Entry |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2016-4028 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2016-4028 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Oct. 19, 2018
Action Type Old Value New Value Removed Reference http://www.securityfocus.com/archive/1/archive/1/538732/100/0/threaded [Third Party Advisory, VDB Entry] Added Reference http://www.securityfocus.com/archive/1/538732/100/0/threaded [No Types Assigned] -
CVE Modified by [email protected]
Jul. 19, 2017
Action Type Old Value New Value Changed Description 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. 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. -
Initial Analysis by [email protected]
Dec. 16, 2016
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:M/Au:S/C:P/I:N/A:N) Added CVSS V3 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.securitytracker.com/id/1036154 No Types Assigned http://www.securitytracker.com/id/1036154 Third Party Advisory, VDB Entry Changed Reference Type http://www.securityfocus.com/archive/1/archive/1/538732/100/0/threaded No Types Assigned http://www.securityfocus.com/archive/1/archive/1/538732/100/0/threaded Third Party Advisory, VDB Entry Added CWE CWE-255 Added CPE Configuration OR *cpe:2.3:a:open-xchange:ox_guard:2.4.0:rev7:*:*:*:*:*:* (and previous)
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2016-4028 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2016-4028
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.00%
score
0.39480
percentile