CVE-2016-9461

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.

Affected Software

References

• http://www.securityfocus.com/bid/97276
• https://github.com/nextcloud/server/commit/3491400261c1454a9a30d3ec96969573330120cc
• https://github.com/owncloud/core/commit/0622e635d97cb17c5e1363e370bb8268cc3d2547
• https://github.com/owncloud/core/commit/121a3304a0c37ccda0e1b63ddc528cba9121a36e
• https://github.com/owncloud/core/commit/acbbadb71ceee7f01da347f7dcd519beda78cc47
• https://github.com/owncloud/core/commit/c0a4b7b3f38ad2eaf506484b3b92ec678cb021c9
• https://hackerone.com/reports/145950
• https://nextcloud.com/security/advisory/?id=nc-sa-2016-004
• https://owncloud.org/security/advisory/?id=oc-sa-2016-014
• http://www.securityfocus.com/bid/97276
• https://github.com/nextcloud/server/commit/3491400261c1454a9a30d3ec96969573330120cc
• https://github.com/owncloud/core/commit/0622e635d97cb17c5e1363e370bb8268cc3d2547
• https://github.com/owncloud/core/commit/121a3304a0c37ccda0e1b63ddc528cba9121a36e
• https://github.com/owncloud/core/commit/acbbadb71ceee7f01da347f7dcd519beda78cc47
• https://github.com/owncloud/core/commit/c0a4b7b3f38ad2eaf506484b3b92ec678cb021c9
• https://hackerone.com/reports/145950
• https://nextcloud.com/security/advisory/?id=nc-sa-2016-004
• https://owncloud.org/security/advisory/?id=oc-sa-2016-014