CVE-2016-3067

Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://cygwin.com/ml/cygwin-announce/2016-02/msg00023.html	Mailing List Release Notes Vendor Advisory
https://cygwin.com/ml/cygwin-announce/2016-04/msg00020.html	Mailing List Release Notes Vendor Advisory
https://cygwin.com/ml/cygwin-announce/2016-04/msg00054.html	Mailing List Release Notes Vendor Advisory
https://cygwin.com/ml/cygwin/2016-02/msg00129.html	Mailing List Release Notes Vendor Advisory
https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044
https://cygwin.com/ml/cygwin-announce/2016-02/msg00023.html	Mailing List Release Notes Vendor Advisory
https://cygwin.com/ml/cygwin-announce/2016-04/msg00020.html	Mailing List Release Notes Vendor Advisory
https://cygwin.com/ml/cygwin-announce/2016-04/msg00054.html	Mailing List Release Notes Vendor Advisory
https://cygwin.com/ml/cygwin/2016-02/msg00129.html	Mailing List Release Notes Vendor Advisory
https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044

Configurations

Configuration 1 (hide)

cpe:2.3:a:cygwin:cygwin:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2017-04-21 20:59

Updated : 2025-04-20 01:37

NVD link : CVE-2016-3067

Mitre link : CVE-2016-3067

CVE.ORG link : CVE-2016-3067

JSON object : View

Products Affected

cygwin

cygwin

CWE

CWE-264

Permissions, Privileges, and Access Controls

{"id": "CVE-2016-3067", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2017-04-21T20:59:00.633", "references": [{"url": "https://cygwin.com/ml/cygwin-announce/2016-02/msg00023.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://cygwin.com/ml/cygwin-announce/2016-04/msg00020.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://cygwin.com/ml/cygwin-announce/2016-04/msg00054.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://cygwin.com/ml/cygwin/2016-02/msg00129.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044", "source": "secalert@redhat.com"}, {"url": "https://cygwin.com/ml/cygwin-announce/2016-02/msg00023.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://cygwin.com/ml/cygwin-announce/2016-04/msg00020.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://cygwin.com/ml/cygwin-announce/2016-04/msg00054.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://cygwin.com/ml/cygwin/2016-02/msg00129.html", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-264"}]}], "descriptions": [{"lang": "en", "value": "Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges."}, {"lang": "es", "value": "Cygwin en versiones anteriores a 2.5.0 no maneja adecuadamente la actualizaci\u00f3n de permisos al cambiar de usuario, lo que permite a los atacantes obtener privilegios."}], "lastModified": "2025-04-20T01:37:25.860", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cygwin:cygwin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F7AF3847-B0AC-45B8-89BD-ECEB581934DE", "versionEndIncluding": "2.4.1-1"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}