{"id":2009,"date":"2017-08-10T16:36:51","date_gmt":"2017-08-10T14:36:51","guid":{"rendered":"http:\/\/blogs.gentoo.org\/ago\/?p=2009"},"modified":"2017-08-16T08:44:38","modified_gmt":"2017-08-16T06:44:38","slug":"imagemagick-heap-based-buffer-overflow-in-omp_outlined-32-enhance-c","status":"publish","type":"post","link":"https:\/\/blogs.gentoo.org\/ago\/2017\/08\/10\/imagemagick-heap-based-buffer-overflow-in-omp_outlined-32-enhance-c\/","title":{"rendered":"imagemagick: heap-based buffer overflow in .omp_outlined..32 (enhance.c)"},"content":{"rendered":"<p><strong>Description<\/strong>:<br \/>\n<a href=\"http:\/\/www.imagemagick.org\/script\/index.php\">imagemagick<\/a> is a software suite to create, edit, compose, or convert bitmap images.<\/p>\n<p>The complete ASan output of the issue:<\/p>\n<pre><font size=\"2\"># convert $FILE null\r\n==109188==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000049f8 at pc 0x7f81ecd9b4c2 bp 0x7ffe3c52f850 sp 0x7ffe3c52f848                                                                        \r\nREAD of size 8 at 0x6020000049f8 thread T0                                                                                                                                                                        \r\n    #0 0x7f81ecd9b4c1 in .omp_outlined..32 \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/enhance.c:1248:13                                                                   \r\n    #1 0x7f81eb8395c2 in __kmp_invoke_microtask \/var\/tmp\/portage\/sys-libs\/libomp-4.0.1\/work\/openmp-4.0.1.src\/runtime\/src\/z_Linux_asm.s:1399                                                                       \r\n    #2 0x7f81eb7e125a in __kmp_fork_call \/var\/tmp\/portage\/sys-libs\/libomp-4.0.1\/work\/openmp-4.0.1.src\/runtime\/src\/kmp_runtime.cpp:1858                                                                            \r\n    #3 0x7f81eb7cd74f in __kmpc_fork_call \/var\/tmp\/portage\/sys-libs\/libomp-4.0.1\/work\/openmp-4.0.1.src\/runtime\/src\/kmp_csupport.cpp:337                                                                           \r\n    #4 0x7f81ecd999b9 in ContrastStretchImage \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/enhance.c:1213:11                                                                \r\n    #5 0x7f81ecbd2280 in SetImageType \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/attribute.c:1262:18                                                                      \r\n    #6 0x7f81e5acd5bd in WriteTIFFImage \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/coders\/tiff.c:3245:16                                                                             \r\n    #7 0x7f81eccc4026 in WriteImage \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/constitute.c:1114:14                                                                       \r\n    #8 0x7f81eccc55a9 in WriteImages \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/constitute.c:1333:13                                                                      \r\n    #9 0x7f81ec50f456 in ConvertImageCommand \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickWand\/convert.c:3280:11                                                                 \r\n    #10 0x7f81ec62e225 in MagickCommandGenesis \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickWand\/mogrify.c:183:14                                                                \r\n    #11 0x5093e9 in MagickMain \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/utilities\/magick.c:149:10                                                                                  \r\n    #12 0x5093e9 in main \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/utilities\/magick.c:180                                                                                           \r\n    #13 0x7f81eb206680 in __libc_start_main \/var\/tmp\/portage\/sys-libs\/glibc-2.23-r4\/work\/glibc-2.23\/csu\/..\/csu\/libc-start.c:289                                                                                   \r\n    #14 0x41a1f8 in _init (\/usr\/bin\/magick+0x41a1f8)                                                                                                                                                              \r\n                                                                                                                                                                                                                  \r\n0x6020000049f8 is located 0 bytes to the right of 8-byte region [0x6020000049f0,0x6020000049f8)                                                                                                                   \r\nallocated by thread T0 here:                                                                                                                                                                                      \r\n    #0 0x4cfba8 in malloc \/var\/tmp\/portage\/sys-libs\/compiler-rt-sanitizers-4.0.1\/work\/compiler-rt-4.0.1.src\/lib\/asan\/asan_malloc_linux.cc:66                                                                      \r\n    #1 0x7f81ecef8df7 in AcquireMagickMemory \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/memory.c:464:10                                                                   \r\n    #2 0x7f81ecef8df7 in AcquireQuantumMemory \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/memory.c:537                                                                     \r\n    #3 0x7f81ecd97037 in ContrastStretchImage \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/enhance.c:1052:20                                                                \r\n    #4 0x7f81ecbd2280 in SetImageType \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/attribute.c:1262:18\r\n    #5 0x7f81e5acd5bd in WriteTIFFImage \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/coders\/tiff.c:3245:16\r\n    #6 0x7f81eccc4026 in WriteImage \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/constitute.c:1114:14\r\n    #7 0x7f81eccc55a9 in WriteImages \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/constitute.c:1333:13\r\n    #8 0x7f81ec50f456 in ConvertImageCommand \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickWand\/convert.c:3280:11\r\n    #9 0x7f81ec62e225 in MagickCommandGenesis \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickWand\/mogrify.c:183:14\r\n    #10 0x5093e9 in MagickMain \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/utilities\/magick.c:149:10\r\n    #11 0x5093e9 in main \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/utilities\/magick.c:180\r\n    #12 0x7f81eb206680 in __libc_start_main \/var\/tmp\/portage\/sys-libs\/glibc-2.23-r4\/work\/glibc-2.23\/csu\/..\/csu\/libc-start.c:289\r\n\r\nSUMMARY: AddressSanitizer: heap-buffer-overflow \/var\/tmp\/portage\/media-gfx\/imagemagick-7.0.6.5\/work\/ImageMagick-7.0.6-5\/MagickCore\/enhance.c:1248:13 in .omp_outlined..32\r\nShadow bytes around the buggy address:\r\n  0x0c047fff88e0: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd\r\n  0x0c047fff88f0: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd\r\n  0x0c047fff8900: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd\r\n  0x0c047fff8910: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd\r\n  0x0c047fff8920: fa fa 00 03 fa fa 00 04 fa fa 05 fa fa fa 00 00\r\n=&gt;0x0c047fff8930: fa fa 00 07 fa fa 00 04 fa fa 00 04 fa fa 00[fa]\r\n  0x0c047fff8940: fa fa 00 fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c047fff8950: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c047fff8960: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c047fff8970: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c047fff8980: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\nShadow byte legend (one shadow byte represents 8 application bytes):\r\n  Addressable:           00\r\n  Partially addressable: 01 02 03 04 05 06 07 \r\n  Heap left redzone:       fa\r\n  Freed heap region:       fd\r\n  Stack left redzone:      f1\r\n  Stack mid redzone:       f2\r\n  Stack right redzone:     f3\r\n  Stack after return:      f5\r\n  Stack use after scope:   f8\r\n  Global redzone:          f9\r\n  Global init order:       f6\r\n  Poisoned by user:        f7\r\n  Container overflow:      fc\r\n  Array cookie:            ac\r\n  Intra object redzone:    bb\r\n  ASan internal:           fe\r\n  Left alloca redzone:     ca\r\n  Right alloca redzone:    cb\r\n==109188==ABORTING\r\n<\/font><\/pre>\n<p><strong>Affected version:<\/strong><br \/>\n7.0.6-5<\/p>\n<p><strong>Fixed version:<\/strong><br \/>\n7.0.6-6 (not released atm)<\/p>\n<p><strong>Commit fix:<\/strong><br \/>\n<a href=\"https:\/\/github.com\/ImageMagick\/ImageMagick\/commit\/1cc6f0ccc92c20c7cab6c4a7335daf29c91f0d8e\">https:\/\/github.com\/ImageMagick\/ImageMagick\/commit\/1cc6f0ccc92c20c7cab6c4a7335daf29c91f0d8e<\/a><\/p>\n<p><strong>Credit:<\/strong><br \/>\nThis bug was discovered by Agostino Sarubbo of Gentoo.<\/p>\n<p><strong>CVE:<\/strong><br \/>\nCVE-2017-12876<\/p>\n<p><strong>Reproducer:<\/strong><br \/>\n<a href=\"https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00306-imagemagick-heapoverflow-enhance_c\">https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00306-imagemagick-heapoverflow-enhance_c<\/a><\/p>\n<p><strong>Timeline:<\/strong><br \/>\n2017-08-09: bug discovered and reported to upstream<br \/>\n2017-08-10: blog post about the issue<br \/>\n2017-08-15: CVE assigned<\/p>\n<p><strong>Note:<\/strong><br \/>\nThis bug was found with <a href=\"http:\/\/lcamtuf.coredump.cx\/afl\">American Fuzzy Lop<\/a>.<br \/>\nThis bug was identified with bare metal servers donated by <a href=\"https:\/\/www.packet.net\/\">Packet<\/a>. This work is also supported by the <a href=\"https:\/\/www.coreinfrastructure.org\">Core Infrastructure Initiative<\/a>.<\/p>\n<p><strong>Permalink:<\/strong><\/p>\n<blockquote data-secret=\"1CFoKu0y9D\" class=\"wp-embedded-content\"><p><a href=\"http:\/\/blogs.gentoo.org\/ago\/2017\/08\/10\/imagemagick-heap-based-buffer-overflow-in-omp_outlined-32-enhance-c\/\">imagemagick: heap-based buffer overflow in .omp_outlined..32 (enhance.c)<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" src=\"http:\/\/blogs.gentoo.org\/ago\/2017\/08\/10\/imagemagick-heap-based-buffer-overflow-in-omp_outlined-32-enhance-c\/embed\/#?secret=1CFoKu0y9D\" data-secret=\"1CFoKu0y9D\" width=\"600\" height=\"338\" title=\"&#8220;imagemagick: heap-based buffer overflow in .omp_outlined..32 (enhance.c)&#8221; &#8212; agostino&#039;s blog\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Description: imagemagick is a software suite to create, edit, compose, or convert bitmap images. The complete ASan output of the issue: # convert $FILE null ==109188==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000049f8 at pc 0x7f81ecd9b4c2 bp 0x7ffe3c52f850 sp 0x7ffe3c52f848 READ of &hellip; <a href=\"https:\/\/blogs.gentoo.org\/ago\/2017\/08\/10\/imagemagick-heap-based-buffer-overflow-in-omp_outlined-32-enhance-c\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":140,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[12,10],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2EaBc-wp","_links":{"self":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/2009"}],"collection":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/users\/140"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/comments?post=2009"}],"version-history":[{"count":3,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/2009\/revisions"}],"predecessor-version":[{"id":2022,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/2009\/revisions\/2022"}],"wp:attachment":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/media?parent=2009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/categories?post=2009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/tags?post=2009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}