An issue was discovered in Open-Xchange OX Guard before 2.4.0-rev8
Published Dec 15, 2016
7.5
HIGHCVSS 3.0
EPSS 0.71%
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.
Affected products
No data.
- ≤ 2.4.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:S/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.71% (0.00709) | 51.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.71% (0.00709) | 48.46th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.17% (0.00166) | 35.17th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00099) | 42.77th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.10% (0.00099) | 41.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00099) | 39.48th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
References (2)
- http://www.securityfocus.com/archive/1/538732/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securitytracker.com/id/1036154 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/archive/1/538732/100/0/threaded | mailing-listx_refsource_BUGTRAQ | |
| http://www.securitytracker.com/id/1036154 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.