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CVE-2016-3619 libtiff: Out-of-bounds Read in the bmp2tiff tool
From: 王梅 <wangmei () 360 cn>
Date: Thu, 7 Apr 2016 07:32:48 +0000
Details ======= Product: libtiff Affected Versions: <= 4.0.6 Vulnerability Type: Out-of-bounds Read Vendor URL: http://www.libtiff.org/ CVE ID: CVE-2016-3619 Credit: Mei Wang of the Cloud Security Team, Qihoo 360 Introduction ============ When bmp2tiff function DumpModeEncode handle malicious bmp file with param -c none will cause Out-of-bounds Read. An attacker could exploit this issue to cause a denial of service. libtiff-master/libtiff/tif_dumpmode.c:62 59 * data buffer to avoid extra copy. 60 */ 61 if (tif->tif_rawcp != pp) 62 _TIFFmemcpy(tif->tif_rawcp, pp, n); 63 tif->tif_rawcp += n; 64 tif->tif_rawcc += n; 65 pp += n; 66 cc -= n; 67 if (tif->tif_rawcc >= tif->tif_rawdatasize && 68 !TIFFFlushData1(tif)) 69 return (0); ./bmp2tiff -c none ./sample/bmp2tiff_none.bmp 1.tif ================================================================= ==16644== ERROR: AddressSanitizer: unknown-crash on address 0x7f6f7dbde800 at pc 0x7f6f7ab77b3f bp 0x7ffc82264d60 sp 0x7ffc82264508 READ of size 3342336 at 0x7f6f7dbde800 thread T0 #0 0x7f6f7ab77b3e (/lib64/libasan.so.0+0xeb3e) #1 0x45b96c in _TIFFmemcpy /home/dazhuang/asan/libtiff-master/libtiff/tif_unix.c:340 #2 0x4614c1 in DumpModeEncode /home/dazhuang/asan/libtiff-master/libtiff/tif_dumpmode.c:62 #3 0x45665e in TIFFWriteScanline /home/dazhuang/asan/libtiff-master/libtiff/tif_write.c:173 #4 0x40450f in main /home/dazhuang/asan/libtiff-master/tools/bmp2tiff.c:775 #5 0x7f6f7a2aeaf4 in __libc_start_main (/lib64/libc.so.6+0x21af4) #6 0x4019a8 in _start (/home/dazhuang/asan/libtiff-master/tools/bmp2tiff+0x4019a8) 0x7f6f7dcee800 is located 0 bytes to the right of 1114112-byte region [0x7f6f7dbde800,0x7f6f7dcee800) allocated by thread T0 here: #0 0x7f6f7ab7f129 (/lib64/libasan.so.0+0x16129) #1 0x45b761 in _TIFFmalloc /home/dazhuang/asan/libtiff-master/libtiff/tif_unix.c:316 #2 0x4037c3 in main /home/dazhuang/asan/libtiff-master/tools/bmp2tiff.c:678 #3 0x7f6f7a2aeaf4 in __libc_start_main (/lib64/libc.so.6+0x21af4) SUMMARY: AddressSanitizer: unknown-crash ??:0 ?? Shadow bytes around the buggy address: 0x0fee6fb73cb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0fee6fb73cc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0fee6fb73cd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0fee6fb73ce0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0fee6fb73cf0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0fee6fb73d00:[00]00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fee6fb73d10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fee6fb73d20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fee6fb73d30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fee6fb73d40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fee6fb73d50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Heap righ redzone: fb Freed Heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 ASan internal: fe ==16644== ABORTING References: [1] http://www.remotesensing.org/libtiff/ [2] http://bugzilla.maptools.org/buglist.cgi?product=libtiff Thank you! Best Regards, Mei
Current thread:
- CVE-2016-3619 libtiff: Out-of-bounds Read in the bmp2tiff tool 王梅 (Apr 07)
- Re: CVE-2016-3619 libtiff: Out-of-bounds Read in the bmp2tiff tool Alan Coopersmith (Apr 07)
- Re: CVE-2016-3619 libtiff: Out-of-bounds Read in the bmp2tiff tool 王梅 (Apr 08)
- Re: CVE-2016-3619 libtiff: Out-of-bounds Read in the bmp2tiff tool Alan Coopersmith (Apr 09)
- Re: CVE-2016-3619 libtiff: Out-of-bounds Read in the bmp2tiff tool 王梅 (Apr 08)
- Re: CVE-2016-3619 libtiff: Out-of-bounds Read in the bmp2tiff tool Alan Coopersmith (Apr 07)