Advisory Published
Advisory Published

ZDI-CAN-18866: Linux Kernel Netfilter Xtables Out-Of-Bounds Read Information Disclosure Vulnerability

First published: Fri Sep 29 2023(Updated: )

This vulnerability allows local attackers to disclose sensitive information on affected installations of the Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the match_flags function. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel.

Affected SoftwareAffected VersionHow to fix

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Frequently Asked Questions

  • What is the severity of ZDI-CAN-18866?

    The severity of ZDI-CAN-18866 is medium (5.1).

  • How does ZDI-CAN-18866 affect Linux Kernel?

    ZDI-CAN-18866 allows local attackers to disclose sensitive information on affected installations of the Linux Kernel.

  • How can the ZDI-CAN-18866 vulnerability be exploited?

    An attacker must first obtain the ability to execute high-privileged code on the target system to exploit ZDI-CAN-18866.

  • Is there any known fix for ZDI-CAN-18866?

    At the time of this advisory, there is no known fix for ZDI-CAN-18866. Please refer to the vendor's advisory or security updates for any available patches or mitigations.

  • Where can I find more information about ZDI-CAN-18866?

    You can find more information about ZDI-CAN-18866 on the Zero Day Initiative (ZDI) website.

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