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.
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Reference Links
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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