CVE-2016-9464
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
52.8%
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.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| nextcloud | nextcloud_server | * | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* |
| nextcloud | nextcloud_server | 10.0 | cpe:2.3:a:nextcloud:nextcloud_server:10.0:rc1:*:*:*:*:*:* |
References
www.securityfocus.com/bid/97287
github.com/nextcloud/server/commit/3387e5d00fcf6b2ea6b285a091e5743f545e7202
github.com/nextcloud/server/commit/7289cb5ec0b812992ab0dfb889744b94bc0994f0
github.com/nextcloud/server/commit/a5471b4a3e3f30e99e4de39c97c0c3b3c2f1618f
github.com/nextcloud/server/commit/e2c4f4f9aa11bc92e8f2212cce73841b922187e8
hackerone.com/reports/153905
nextcloud.com/security/advisory/?id=nc-sa-2016-007
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
52.8%