Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | < 9.0.54 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/97287Third Party AdvisoryVDB Entry
- https://github.com/nextcloud/server/commit/3387e5d00fcf6b2ea6b285a091e5743f545e7Issue TrackingPatchThird Party Advisory
- https://github.com/nextcloud/server/commit/7289cb5ec0b812992ab0dfb889744b94bc099Issue TrackingPatchThird Party Advisory
- https://github.com/nextcloud/server/commit/a5471b4a3e3f30e99e4de39c97c0c3b3c2f16Issue TrackingPatchThird Party Advisory
- https://github.com/nextcloud/server/commit/e2c4f4f9aa11bc92e8f2212cce73841b92218Issue TrackingPatchThird Party Advisory
- https://hackerone.com/reports/153905ExploitThird Party Advisory
- https://nextcloud.com/security/advisory/?id=nc-sa-2016-007PatchVendor Advisory
- http://www.securityfocus.com/bid/97287Third Party AdvisoryVDB Entry
- https://github.com/nextcloud/server/commit/3387e5d00fcf6b2ea6b285a091e5743f545e7Issue TrackingPatchThird Party Advisory
- https://github.com/nextcloud/server/commit/7289cb5ec0b812992ab0dfb889744b94bc099Issue TrackingPatchThird Party Advisory
- https://github.com/nextcloud/server/commit/a5471b4a3e3f30e99e4de39c97c0c3b3c2f16Issue TrackingPatchThird Party Advisory
- https://github.com/nextcloud/server/commit/e2c4f4f9aa11bc92e8f2212cce73841b92218Issue TrackingPatchThird Party Advisory
- https://hackerone.com/reports/153905ExploitThird Party Advisory
- https://nextcloud.com/security/advisory/?id=nc-sa-2016-007PatchVendor Advisory
FAQ
What is CVE-2016-9464?
CVE-2016-9464 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 an...
How severe is CVE-2016-9464?
CVE-2016-9464 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-9464?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Nextcloud Server.