{"id":1138,"date":"2017-01-25T11:05:17","date_gmt":"2017-01-25T09:05:17","guid":{"rendered":"http:\/\/blogs.gentoo.org\/ago\/?p=1138"},"modified":"2017-03-13T13:11:16","modified_gmt":"2017-03-13T11:11:16","slug":"jasper-heap-based-buffer-overflow-in-jpc_dec_decodepkt-jpc_t2dec-c","status":"publish","type":"post","link":"https:\/\/blogs.gentoo.org\/ago\/2017\/01\/25\/jasper-heap-based-buffer-overflow-in-jpc_dec_decodepkt-jpc_t2dec-c\/","title":{"rendered":"jasper: heap-based buffer overflow in jpc_dec_decodepkt (jpc_t2dec.c)"},"content":{"rendered":"<p><strong>Description<\/strong>:<br \/>\n<a href=\"http:\/\/www.ece.uvic.ca\/~frodo\/jasper\/\">jasper<\/a> is an open-source initiative to provide a free software-based reference implementation of the codec specified in the JPEG-2000 Part-1 standard.<\/p>\n<p>Another round of fuzzing shows that a crafted image causes a read overflow.<\/p>\n<p>The complete ASan output:<\/p>\n<pre><font size=\"2\"># imginfo -f $FILE\r\nwarning: ignoring unknown marker segment (0xff70)\r\ntype = 0xff70 (UNKNOWN); len = 35;00 01 43 72 65 61 74 6f 74 3a 30 4a 61 73 50 65 72 00 01 00 00 73 69 6f 6e 20 31 2e 39 30 30 2e 39 warning: trailing garbage in marker segment (3 bytes)\r\nwarning: trailing garbage in marker segment (8 bytes)\r\nwarning: trailing garbage in marker segment (6 bytes)\r\n=================================================================\r\n==30315==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61a00001f808 at pc 0x7fb7b2667e54 bp 0x7ffd0a9ab890 sp 0x7ffd0a9ab888\r\nREAD of size 8 at 0x61a00001f808 thread T0\r\n    #0 0x7fb7b2667e53 in jpc_dec_decodepkt \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_t2dec.c:245:14\r\n    #1 0x7fb7b2667e53 in jpc_dec_decodepkts \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_t2dec.c:454\r\n    #2 0x7fb7b25ccd37 in jpc_dec_process_sod \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_dec.c:628:6\r\n    #3 0x7fb7b25d6853 in jpc_dec_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_dec.c:425:10\r\n    #4 0x7fb7b25d6853 in jpc_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_dec.c:262\r\n    #5 0x7fb7b25a6231 in jp2_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jp2\/jp2_dec.c:218:21\r\n    #6 0x7fb7b2568214 in jas_image_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/base\/jas_image.c:444:16\r\n    #7 0x50a3be in main \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/appl\/imginfo.c:238:16\r\n    #8 0x7fb7b164878f in __libc_start_main \/tmp\/portage\/sys-libs\/glibc-2.23-r3\/work\/glibc-2.23\/csu\/..\/csu\/libc-start.c:289\r\n    #9 0x419cd8 in _start (\/usr\/bin\/imginfo+0x419cd8)\r\n\r\n0x61a00001f808 is located 48 bytes to the right of 1368-byte region [0x61a00001f280,0x61a00001f7d8)\r\nallocated by thread T0 here:\r\n    #0 0x4d2a98 in malloc \/tmp\/portage\/sys-devel\/llvm-3.9.1\/work\/llvm-3.9.1.src\/projects\/compiler-rt\/lib\/asan\/asan_malloc_linux.cc:64\r\n    #1 0x7fb7b2575160 in jas_malloc \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/base\/jas_malloc.c:242:11\r\n    #2 0x7fb7b2575160 in jas_alloc2 \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/base\/jas_malloc.c:275\r\n    #3 0x7fb7b25ca2bf in jpc_dec_tileinit \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_dec.c:841:24\r\n    #4 0x7fb7b25ca2bf in jpc_dec_process_sod \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_dec.c:594\r\n    #5 0x7fb7b25d6853 in jpc_dec_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_dec.c:425:10\r\n    #6 0x7fb7b25d6853 in jpc_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_dec.c:262\r\n    #7 0x7fb7b25a6231 in jp2_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jp2\/jp2_dec.c:218:21\r\n    #8 0x7fb7b2568214 in jas_image_decode \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/base\/jas_image.c:444:16\r\n    #9 0x50a3be in main \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/appl\/imginfo.c:238:16\r\n    #10 0x7fb7b164878f in __libc_start_main \/tmp\/portage\/sys-libs\/glibc-2.23-r3\/work\/glibc-2.23\/csu\/..\/csu\/libc-start.c:289\r\n\r\nSUMMARY: AddressSanitizer: heap-buffer-overflow \/tmp\/portage\/media-libs\/jasper-2.0.10\/work\/jasper-2.0.10\/src\/libjasper\/jpc\/jpc_t2dec.c:245:14 in jpc_dec_decodepkt\r\nShadow bytes around the buggy address:\r\n  0x0c347fffbeb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0c347fffbec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0c347fffbed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0c347fffbee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0c347fffbef0: 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa\r\n=&gt;0x0c347fffbf00: fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c347fffbf10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c347fffbf20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c347fffbf30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c347fffbf40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa\r\n  0x0c347fffbf50: 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  Heap right redzone:      fb\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 partial redzone:   f4\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==30315==ABORTING\r\n<\/font><\/pre>\n<p><strong>Affected version:<\/strong><br \/>\n2.0.10<\/p>\n<p><strong>Fixed version:<\/strong><br \/>\nN\/A<\/p>\n<p><strong>Commit fix:<\/strong><br \/>\nN\/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-2017-6852<\/p>\n<p><strong>Reproducer:<\/strong><br \/>\n<a href=\"https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00126-jasper-heapoverflow-jpc_dec_decodepkt\">https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00126-jasper-heapoverflow-jpc_dec_decodepkt<\/a><\/p>\n<p><strong>Timeline:<\/strong><br \/>\n2017-01-25: bug discovered and reported upstream<br \/>\n2017-01-25: blog post about the issue<br \/>\n2017-03-12: 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>.<\/p>\n<p><strong>Permalink:<\/strong><\/p>\n<blockquote data-secret=\"Hl8PGwXFu9\" class=\"wp-embedded-content\"><p><a href=\"http:\/\/blogs.gentoo.org\/ago\/2017\/01\/25\/jasper-heap-based-buffer-overflow-in-jpc_dec_decodepkt-jpc_t2dec-c\/\">jasper: heap-based buffer overflow in jpc_dec_decodepkt (jpc_t2dec.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\/01\/25\/jasper-heap-based-buffer-overflow-in-jpc_dec_decodepkt-jpc_t2dec-c\/embed\/#?secret=Hl8PGwXFu9\" data-secret=\"Hl8PGwXFu9\" width=\"600\" height=\"338\" title=\"&#8220;jasper: heap-based buffer overflow in jpc_dec_decodepkt (jpc_t2dec.c)&#8221; &#8212; agostino&#039;s blog\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Description: jasper is an open-source initiative to provide a free software-based reference implementation of the codec specified in the JPEG-2000 Part-1 standard. Another round of fuzzing shows that a crafted image causes a read overflow. The complete ASan output: # &hellip; <a href=\"https:\/\/blogs.gentoo.org\/ago\/2017\/01\/25\/jasper-heap-based-buffer-overflow-in-jpc_dec_decodepkt-jpc_t2dec-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-im","_links":{"self":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/1138"}],"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=1138"}],"version-history":[{"count":5,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/1138\/revisions"}],"predecessor-version":[{"id":1477,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/1138\/revisions\/1477"}],"wp:attachment":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/media?parent=1138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/categories?post=1138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/tags?post=1138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}