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Vulnerability · Published Nov 24, 2023 · Assigned by mitre

CVE-2023-49298

High 7.5

In plain English

A high-severity authorization bypass via user-controlled key in the zfs package (Alpine). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.2%top 32.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20zfs2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.21zfs2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.22zfs2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.23zfs2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.24zfs2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.20zfs-lts2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.21zfs-lts2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.22zfs-lts2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.23zfs-lts2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.24zfs-lts2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.20zfs-rpi2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.21zfs-rpi2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.22zfs-rpi2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.23zfs-rpi2.2.1-r1ALPINE-CVE-2023-49298
Alpine:v3.24zfs-rpi2.2.1-r1ALPINE-CVE-2023-49298
Debian:12zfs-linux2.1.11-1+deb12u1DEBIAN-CVE-2023-49298
Debian:13zfs-linux2.1.14-1DEBIAN-CVE-2023-49298
Debian:14zfs-linux2.1.14-1DEBIAN-CVE-2023-49298
Ubuntu:22.04:LTSzfs-linux2.1.5-1ubuntu6~22.04.4UBUNTU-CVE-2023-49298
Ubuntu:24.04:LTSzfs-linux2.2.2-0ubuntu2UBUNTU-CVE-2023-49298

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References