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2.3 KiB
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77 lines
No EOL
2.3 KiB
Text
# Exploit Title: Oracle Java lookupByteBI function heap buffer overflow
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# Google Dork:
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# Date: 2013-09-03
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# Exploit Author: GuHe
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# Vendor Homepage: http://www.oracle.com/
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# Software Link:
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http://www.oracle.com/technetwork/java/javase/downloads/index.html
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# Version: 7u21 and eariler
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# Tested on: Windows 7
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# CVE : CVE-2013-2470
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PoC: https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/28050.zip
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CVE-2013-2470 - Java_sun_awt_image_ImagingLib_lookupByteBI heap buffer
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overflow
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1. Affected Software
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JRE 7 update 21 and earlier
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JRE 6 update 45 and earlier
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2. Root cause analysis
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The "Java_sun_awt_image_ImagingLib_lookupByteBI" performs byte lookup
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operation on two BufferedImage.
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In the following code:
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/* Mlib needs 16bit lookuptable and must be signed! */
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if (src->type == MLIB_SHORT) {
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unsigned short *sdataP = (unsigned short *) src->data;
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unsigned short *sP;
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if (dst->type == MLIB_BYTE) {
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unsigned char *cdataP = (unsigned char *) dst->data;
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unsigned char *cP;
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if (nbands > 1) {
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retStatus = 0;
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}
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else {
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int x, y;
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for (y=0; y < src->height; y++) {
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cP = cdataP;
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sP = sdataP;
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for (x=0; x < src->width; x++) {
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*cP++ = table[0][*sP++];
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}
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/*
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* 4554571: increment pointers using the scanline stride
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* in pixel units (not byte units)
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*/
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cdataP += dstImageP->raster.scanlineStride;
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sdataP += srcImageP->raster.scanlineStride;
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}
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}
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}
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/* How about ddata == null? */
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}
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It tries to map data in src raster to the dst raster. The total bytes
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written to dst rater buffer is:
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(src->width) * (src->height). However, it does not correctly check the size
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of the dst buffer, if the size of the
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dst buffer is smaller than (src->width) * (src->height), it will be
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overflowed.
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3. Poc
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See "TestByteBI.java" for the source code.
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And you can test the poc by directly open the "HelloApplet.html" in a web
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browser.
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4. Tested on
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JRE 7 update 21 on Windows 7 Enterprise |