wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf 漏洞信息(CVE-2023-53524)

一、漏洞 CVE-2023-53524 基础信息

AIGC 神龙大模型
美国国家漏洞数据库 NVD

漏洞信息

                                        # iwlwifi PCIe 整数溢出漏洞

N/A

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漏洞标题

wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf

来源：美国国家漏洞数据库 NVD

漏洞描述信息

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf An integer overflow occurs in the iwl_write_to_user_buf() function, which is called by the iwl_dbgfs_monitor_data_read() function. static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count, void *buf, ssize_t *size, ssize_t *bytes_copied) { int buf_size_left = count - *bytes_copied; buf_size_left = buf_size_left - (buf_size_left % sizeof(u32)); if (*size > buf_size_left) *size = buf_size_left; If the user passes a SIZE_MAX value to the "ssize_t count" parameter, the ssize_t count parameter is assigned to "int buf_size_left". Then compare "*size" with "buf_size_left" . Here, "buf_size_left" is a negative number, so "*size" is assigned "buf_size_left" and goes into the third argument of the copy_to_user function, causing a heap overflow. This is not a security vulnerability because iwl_dbgfs_monitor_data_read() is a debugfs operation with 0400 privileges.

来源：美国国家漏洞数据库 NVD