{"id":902,"date":"2016-11-20T16:21:45","date_gmt":"2016-11-20T14:21:45","guid":{"rendered":"http:\/\/blogs.gentoo.org\/ago\/?p=902"},"modified":"2016-11-24T14:59:45","modified_gmt":"2016-11-24T12:59:45","slug":"jasper-stack-based-buffer-overflow-in-jpc_tsfb_getbands2-jpc_tsfb-c","status":"publish","type":"post","link":"https:\/\/blogs.gentoo.org\/ago\/2016\/11\/20\/jasper-stack-based-buffer-overflow-in-jpc_tsfb_getbands2-jpc_tsfb-c\/","title":{"rendered":"jasper: stack-based buffer overflow in jpc_tsfb_getbands2 (jpc_tsfb.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>A crafted image, through an intensive fuzz on the 1.900.22 version revealed a stack overflow.<\/p>\n<p>The complete ASan output:<\/p>\n<pre><font size=\"2\"># imginfo -f $FILE\r\nwarning: trailing garbage in marker segment (9 bytes)\r\nwarning: trailing garbage in marker segment (28 bytes)\r\nwarning: trailing garbage in marker segment (40 bytes)\r\nwarning: ignoring unknown marker segment (0xffee)\r\ntype = 0xffee (UNKNOWN); len = 23;1f 32 ff ff ff 00 10 00 3d 4d 00 01 32 ff 00 e4 00 10 00 00 4f warning: trailing garbage in marker segment (14 bytes)\r\n=================================================================\r\n==9166==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7faf2e200c20 at pc 0x7faf320a985a bp 0x7ffd397b9b10 sp 0x7ffd397b9b08\r\nWRITE of size 4 at 0x7faf2e200c20 thread T0\r\n    #0 0x7faf320a9859 in jpc_tsfb_getbands2 \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_tsfb.c:227:16\r\n    #1 0x7faf320a9009 in jpc_tsfb_getbands2 \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_tsfb.c:223:3\r\n    #2 0x7faf320a8b9f in jpc_tsfb_getbands \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_tsfb.c:187:3\r\n    #3 0x7faf3200eaa6 in jpc_dec_tileinit \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_dec.c:714:4\r\n    #4 0x7faf3200eaa6 in jpc_dec_process_sod \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_dec.c:560\r\n    #5 0x7faf3201c1c3 in jpc_dec_decode \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_dec.c:391:10\r\n    #6 0x7faf3201c1c3 in jpc_decode \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_dec.c:255\r\n    #7 0x7faf31f7e684 in jas_image_decode \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/base\/jas_image.c:406:16\r\n    #8 0x509c9a in main \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/appl\/imginfo.c:203:16\r\n    #9 0x7faf3108761f in __libc_start_main \/var\/tmp\/portage\/sys-libs\/glibc-2.22-r4\/work\/glibc-2.22\/csu\/libc-start.c:289\r\n    #10 0x419988 in _init (\/usr\/bin\/imginfo+0x419988)\r\n\r\nAddress 0x7faf2e200c20 is located in stack of thread T0 at offset 3104 in frame\r\n    #0 0x7faf3200dbbf in jpc_dec_process_sod \/tmp\/portage\/media-libs\/jasper-1.900.22\/work\/jasper-1.900.22\/src\/libjasper\/jpc\/jpc_dec.c:544\r\n\r\n  This frame has 1 object(s):\r\n    [32, 3104) 'bnds.i' 0x0ff665c38180: 00 00 00 00[f3]f3 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3\r\n  0x0ff665c38190: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0ff665c381a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0ff665c381b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0ff665c381c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\r\n  0x0ff665c381d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\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==9166==ABORTING\r\n<\/font><\/pre>\n<p><strong>Affected version:<\/strong><br \/>\n1.900.22<\/p>\n<p><strong>Fixed version:<\/strong><br \/>\n1.900.30<\/p>\n<p><strong>Commit fix:<\/strong><br \/>\n<a href=\"https:\/\/github.com\/mdadams\/jasper\/commit\/1abc2e5a401a4bf1d5ca4df91358ce5df111f495\">https:\/\/github.com\/mdadams\/jasper\/commit\/1abc2e5a401a4bf1d5ca4df91358ce5df111f495<\/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-2016-9560<\/p>\n<p><strong>Reproducer:<\/strong><br \/>\n<a href=\"https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00047-jasper-stackoverflow-jpc_tsfb_getbands2\">https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00047-jasper-stackoverflow-jpc_tsfb_getbands2<\/a><\/p>\n<p><strong>Timeline:<\/strong><br \/>\n2016-11-09: bug discovered and reported to upstream<br \/>\n2016-11-20: upstream released a patch<br \/>\n2016-11-20: blog post about the issue<br \/>\n2016-11-23: 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=\"gs4irPeOZ0\" class=\"wp-embedded-content\"><p><a href=\"http:\/\/blogs.gentoo.org\/ago\/2016\/11\/20\/jasper-stack-based-buffer-overflow-in-jpc_tsfb_getbands2-jpc_tsfb-c\/\">jasper: stack-based buffer overflow in jpc_tsfb_getbands2 (jpc_tsfb.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\/2016\/11\/20\/jasper-stack-based-buffer-overflow-in-jpc_tsfb_getbands2-jpc_tsfb-c\/embed\/#?secret=gs4irPeOZ0\" data-secret=\"gs4irPeOZ0\" width=\"600\" height=\"338\" title=\"&#8220;jasper: stack-based buffer overflow in jpc_tsfb_getbands2 (jpc_tsfb.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. A crafted image, through an intensive fuzz on the 1.900.22 version revealed a stack overflow. The complete ASan &hellip; <a href=\"https:\/\/blogs.gentoo.org\/ago\/2016\/11\/20\/jasper-stack-based-buffer-overflow-in-jpc_tsfb_getbands2-jpc_tsfb-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-ey","_links":{"self":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/902"}],"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=902"}],"version-history":[{"count":4,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/902\/revisions"}],"predecessor-version":[{"id":967,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/902\/revisions\/967"}],"wp:attachment":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/media?parent=902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/categories?post=902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/tags?post=902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}