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CVE-2023-49298

Published: 24 November 2023

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
zfs-linux
Launchpad, Ubuntu, Debian
bionic Needed

focal Needed

jammy Needed

lunar Ignored
(end of life, was needed)
mantic Needed

trusty Ignored
(end of standard support)
upstream
Released (2.1.14,2.2.2)
xenial Needed

Patches:
upstream: https://github.com/openzfs/zfs/pull/15571
upstream: https://github.com/openzfs/zfs/commit/77b0c6f0403b2b7d145bf6c244b6acbc757ccdc9
upstream: https://github.com/openzfs/zfs/commit/9b9b09f452a469458451c221debfbab944e7f081

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N