Advisory Details

April 13th, 2023

Linux Kernel DPT I2O Controller Time-Of-Check Time-Of-Use Information Disclosure Vulnerability

ZDI-23-440
ZDI-CAN-17016

CVE ID CVE-2023-2007
CVSS SCORE 6.7, AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L
AFFECTED VENDORS Linux
AFFECTED PRODUCTS Kernel
VULNERABILITY DETAILS

This vulnerability allows local attackers to disclose sensitive information on affected installations of 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 DPT I2O Controller driver. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this in conjunction with other vulnerabilities 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://github.com/torvalds/linux/commit/b04e75a4a8a81887386a0d2dbf605a48e779d2a0
DISCLOSURE TIMELINE
  • 2022-04-01 - Vulnerability reported to vendor
  • 2023-04-13 - Coordinated public release of advisory
CREDIT Lucas Leong (@_wmliang_) and Reno Robert of Trend Micro Zero Day Initiative
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