National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-9464 Detail

Current Description

Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N (V3 legend)
Impact Score: 1.4
Exploitability Score: 2.8


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 4.0 MEDIUM
Vector: (AV:N/AC:L/Au:S/C:N/I:P/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): Single
Confidentiality (C): None
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/97287 Third Party Advisory VDB Entry
https://github.com/nextcloud/server/commit/3387e5d00fcf6b2ea6b285a091e5743f545e7202 Issue Tracking Patch Third Party Advisory
https://github.com/nextcloud/server/commit/7289cb5ec0b812992ab0dfb889744b94bc0994f0 Issue Tracking Patch Third Party Advisory
https://github.com/nextcloud/server/commit/a5471b4a3e3f30e99e4de39c97c0c3b3c2f1618f Issue Tracking Patch Third Party Advisory
https://github.com/nextcloud/server/commit/e2c4f4f9aa11bc92e8f2212cce73841b922187e8 Issue Tracking Patch Third Party Advisory
https://hackerone.com/reports/153905 Exploit Third Party Advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2016-007 Patch Vendor Advisory

Technical Details

Vulnerability Type (View All)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
9.0.54
 cpe:2.3:a:nextcloud:nextcloud_server:10.0:rc1:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-9464
NVD Published Date:
03/27/2017
NVD Last Modified:
03/12/2019