OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenarios involving applications that try to rely on efficient copying of file data, can replace file contents with zero-valued bytes and thus potentially disable security mechanisms. NOTE: this issue is not always security related, but can be security related in realistic situations. A possible example is cp, from a recent GNU Core Utilities (coreutils) version, when attempting to preserve a rule set for denying unauthorized access. (One might use cp when configuring access control, such as with the /etc/hosts.deny file specified in the IBM Support reference.) NOTE: this issue occurs less often in version 2.2.1, and in versions before 2.1.4, because of the default configuration in those versions.
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
| Link | Tags |
|---|---|
| https://github.com/openzfs/zfs/pull/15571 | patch vendor advisory exploit |
| https://github.com/openzfs/zfs/issues/15526 | patch exploit vendor advisory issue tracking |
| https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275308 | patch issue tracking |
| https://news.ycombinator.com/item?id=38405731 | third party advisory patch |
| https://web.archive.org/web/20231124172959/https://www.ibm.com/support/pages/how-remove-missing%C2%A0newline%C2%A0or%C2%A0line%C2%A0too%C2%A0long-error-etchostsallow%C2%A0and%C2%A0etchostsdeny-files | third party advisory |
| https://github.com/openzfs/zfs/releases/tag/zfs-2.2.2 | |
| https://github.com/openzfs/zfs/releases/tag/zfs-2.1.14 | |
| https://www.theregister.com/2023/12/04/two_new_versions_of_openzfs/ | |
| https://bugs.gentoo.org/917224 | |
| https://news.ycombinator.com/item?id=38770168 | |
| https://lists.debian.org/debian-lts-announce/2024/03/msg00019.html | mailing list |