CVE-2023-49298 | BDVDB-2026-217704 Detail
openzfsopenzfs
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact high, availability impact none. Attack vector: network.
Weaknesses#
- CWE-639 Authorization Bypass Through User-Controlled Key
References#
- https://github.com/openzfs/zfs/pull/15571
- https://github.com/openzfs/zfs/issues/15526
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275308
- https://news.ycombinator.com/item?id=38405731
- 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
- 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
- https://lists.debian.org/debian-lts-announce/2025/04/msg00009.html
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.