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CVE-2023-49298

Publication date 24 November 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
zfs-linux 24.04 LTS noble
Fixed 2.2.2-0ubuntu2
23.10 mantic
Fixed 2.2.0-0ubuntu1~23.10.3
23.04 lunar Ignored
22.04 LTS jammy
Fixed 2.1.5-1ubuntu6~22.04.4
20.04 LTS focal
Fixed 0.8.3-1ubuntu12.17
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
Vulnerable
14.04 LTS trusty Ignored

Notes

mdeslaur

This was fixed by a SRU in bug 2044657. For jammy and mantic, the packages were subsequently released in the -security pocket, but for focal, it is still in -updates, but the issue isn't seen in the focal version because of the default configuration so marking as released. No USN has been published for these updates.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
zfs-linux

Severity score breakdown

Parameter Value
Base score 7.5 · High
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