Advisory Details

June 10th, 2024

Linux Kernel RSVP Filter Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-24-591
ZDI-CAN-18387

CVE ID CVE-2023-42755
CVSS SCORE 6.7, AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H
AFFECTED VENDORS Linux
AFFECTED PRODUCTS Kernel
VULNERABILITY DETAILS

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 processing of RSVP filters. 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 buffer. An attacker can leverage this in conjunction with other vulnerabilties to escalate privileges and 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://bugzilla.redhat.com/show_bug.cgi?id=2239847
DISCLOSURE TIMELINE
  • 2022-08-19 - Vulnerability reported to vendor
  • 2024-06-10 - Coordinated public release of advisory
CREDIT Lucas Leong (@_wmliang_) of Trend Micro Zero Day Initiative
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