CVE-2016-9461

low-risk

Published 2017-03-28

Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying edit check permissions on WebDAV copy actions. The WebDAV endpoint was not properly checking the permission on a WebDAV COPY action. This allowed an authenticated attacker with access to a read-only share to put new files in there. It was not possible to modify existing files.

Do I need to act?

0.76% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.3/10 Medium

NETWORK / LOW complexity

Affected Products (2)

Nextcloud Server

Owncloud

Affected Vendors

Nextcloud Owncloud

References (18)

Third Party Advisory http://www.securityfocus.com/bid/97276

Issue Tracking https://github.com/nextcloud/server/commit/3491400261c1454a9a30d3ec9696957333012...

Issue Tracking https://github.com/owncloud/core/commit/0622e635d97cb17c5e1363e370bb8268cc3d2547

Issue Tracking https://github.com/owncloud/core/commit/121a3304a0c37ccda0e1b63ddc528cba9121a36e

Issue Tracking https://github.com/owncloud/core/commit/acbbadb71ceee7f01da347f7dcd519beda78cc47

Issue Tracking https://github.com/owncloud/core/commit/c0a4b7b3f38ad2eaf506484b3b92ec678cb021c9

Exploit https://hackerone.com/reports/145950

Patch https://nextcloud.com/security/advisory/?id=nc-sa-2016-004

Patch https://owncloud.org/security/advisory/?id=oc-sa-2016-014