Linux Kernel Netfilter Conntrack Out-Of-Bounds Read Information Disclosure Vulnerability

July 29th, 2024
ZDI-24-995 ZDI-CAN-21202

CVE ID

CVE-2023-39197

CVSS Score

4.0 AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

Affected Vendors

Linux

Affected Products

Kernel

Vulnerability Details

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of the DCCP protocol. 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.

Additional Details

Linux has issued an update to correct this vulnerability. More details can be found at:
https://access.redhat.com/security/cve/CVE-2023-39197

Disclosure Timeline

  • 2023-05-19 - Vulnerability reported to vendor
  • 2024-07-29 - Coordinated public release of advisory
  • 2024-08-15 - Advisory Updated

Credit

Lucas Leong (@_wmliang_) of Trend Micro Zero Day Initiative

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