CVE-2023-49298
A possible example is cp, from a recent GNU Core Utilities (coreutils) version, when attempting to preserve a rule set for denying unauthorized access.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.16% probability · 65th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-639
- Affected
- openzfs/openzfs
- Source
- cve@mitre.org
References
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275308Issue Tracking, Patch
- https://bugs.gentoo.org/917224
- https://github.com/openzfs/zfs/issues/15526Exploit, Issue Tracking, Patch, Vendor Advisory
- https://github.com/openzfs/zfs/pull/15571Exploit, Patch, Vendor Advisory
- https://github.com/openzfs/zfs/releases/tag/zfs-2.1.14
- https://github.com/openzfs/zfs/releases/tag/zfs-2.2.2
- https://lists.debian.org/debian-lts-announce/2024/03/msg00019.html
- https://news.ycombinator.com/item?id=38405731Patch, Third Party Advisory
- https://news.ycombinator.com/item?id=38770168
- 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-filesThird Party Advisory
- https://www.theregister.com/2023/12/04/two_new_versions_of_openzfs/
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275308Issue Tracking, Patch
- https://bugs.gentoo.org/917224
- https://github.com/openzfs/zfs/issues/15526Exploit, Issue Tracking, Patch, Vendor Advisory
- https://github.com/openzfs/zfs/pull/15571Exploit, Patch, Vendor Advisory
- https://github.com/openzfs/zfs/releases/tag/zfs-2.1.14
- https://github.com/openzfs/zfs/releases/tag/zfs-2.2.2
- https://lists.debian.org/debian-lts-announce/2024/03/msg00019.html
- https://lists.debian.org/debian-lts-announce/2025/04/msg00009.html
- https://news.ycombinator.com/item?id=38405731Patch, Third Party Advisory
- https://news.ycombinator.com/item?id=38770168
- 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-filesThird Party Advisory
- https://www.theregister.com/2023/12/04/two_new_versions_of_openzfs/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.