CRITICAL
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges
Published Apr 21, 2017
9.8
CRITICALCVSS 3.0
EPSS 2.04%
Description
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.04% 0.02040
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02040
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.04% (0.02040) | 80.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.04% (0.02040) | 78.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.59% (0.00590) | 67.33th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.52% (0.00524) | 77.67th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.52% (0.00524) | 76.22th | v3 (v2023.03.01) |
| May 8, 2023 | 0.52% (0.00524) | 73.46th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00473) | 71.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
Weaknesses (1)
References (5)
- https://cygwin.com/ml/cygwin-announce/2016-02/msg00023.html mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory
- https://cygwin.com/ml/cygwin-announce/2016-04/msg00020.html mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory
- https://cygwin.com/ml/cygwin-announce/2016-04/msg00054.html mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory
- https://cygwin.com/ml/cygwin/2016-02/msg00129.html mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory
- https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044 x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| https://cygwin.com/ml/cygwin-announce/2016-02/msg00023.html | mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory | |
| https://cygwin.com/ml/cygwin-announce/2016-04/msg00020.html | mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory | |
| https://cygwin.com/ml/cygwin-announce/2016-04/msg00054.html | mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory | |
| https://cygwin.com/ml/cygwin/2016-02/msg00129.html | mailing-listx_refsource_MLISTMailing ListRelease NotesVendor Advisory | |
| https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044 | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Apr 21, 2017
Updated Aug 5, 2024
Reserved Mar 10, 2016
Link CVE-2016-3067
CISA Vulnrichment
Updated n/a