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CVE-2023-49298

7.5 · HIGH

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…

Published Nov 24, 2023CWE-639EPSS 1.16%

Overview

CVE-2023-49298 is a high-severity vulnerability. It was published on November 24, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugs.freebsd.org/bugzilla/show_bug.cgi?id=275308Refbugs.gentoo.org/917224GitHubgithub.com/openzfs/zfs/issues/15526GitHubgithub.com/openzfs/zfs/pull/15571GitHubgithub.com/openzfs/zfs/releases/tag/zfs-2.1.14GitHubgithub.com/openzfs/zfs/releases/tag/zfs-2.2.2Reflists.debian.org/debian-lts-announce/2024/03/msg00019.htmlRefnews.ycombinator.com/item?id=38405731Refnews.ycombinator.com/item?id=38770168Refweb.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

How CyberStrike helps

Frequently asked questions

What is CVE-2023-49298?

CVE-2023-49298 is a high-severity vulnerability. It was published on November 24, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-49298?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-49298?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-49298?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-49298 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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