{"id":2320,"date":"2017-10-03T16:18:04","date_gmt":"2017-10-03T14:18:04","guid":{"rendered":"http:\/\/blogs.gentoo.org\/ago\/?p=2320"},"modified":"2017-10-04T12:59:58","modified_gmt":"2017-10-04T10:59:58","slug":"binutils-infinite-loop-in-find_abstract_instance_name-dwarf2-c","status":"publish","type":"post","link":"https:\/\/blogs.gentoo.org\/ago\/2017\/10\/03\/binutils-infinite-loop-in-find_abstract_instance_name-dwarf2-c\/","title":{"rendered":"binutils: infinite loop in find_abstract_instance_name (dwarf2.c)"},"content":{"rendered":"<p><strong>Description<\/strong>:<br \/>\n<a href=\"https:\/\/sourceware.org\/binutils\/\">binutils<\/a> is a set of tools necessary to build programs.<\/p>\n<p>The relevant ASan output of the issue:<\/p>\n<pre><font size=\"2\"># nm -A -a -l -S -s --special-syms --synthetic --with-symbol-versions -D $FILE\r\n==22616==ERROR: AddressSanitizer: stack-overflow on address 0x7ffc2948efe8 (pc 0x0000004248eb bp 0x7ffc2948f8e0 sp 0x7ffc2948efe0 T0)\r\n    #0 0x4248ea in __asan::Allocator::Allocate(unsigned long, unsigned long, __sanitizer::BufferedStackTrace*, __asan::AllocType, bool) \/var\/tmp\/portage\/sys-libs\/compiler-rt-sanitizers-5.0.0\/work\/compiler-rt-5.0.0.src\/lib\/asan\/asan_allocator.cc:381\r\n    #1 0x41f8f3 in __asan::asan_malloc(unsigned long, __sanitizer::BufferedStackTrace*) \/var\/tmp\/portage\/sys-libs\/compiler-rt-sanitizers-5.0.0\/work\/compiler-rt-5.0.0.src\/lib\/asan\/asan_allocator.cc:814\r\n    #2 0x4d8de4 in malloc \/var\/tmp\/portage\/sys-libs\/compiler-rt-sanitizers-5.0.0\/work\/compiler-rt-5.0.0.src\/lib\/asan\/asan_malloc_linux.cc:68\r\n    #3 0x7ff17b5b237c in bfd_malloc \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/libbfd.c:193:9                                                                                                     \r\n    #4 0x7ff17b5a7b2f in bfd_get_full_section_contents \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/compress.c:248:21                                                                               \r\n    #5 0x7ff17b5e16d3 in bfd_simple_get_relocated_section_contents \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/simple.c:193:12                                                                     \r\n    #6 0x7ff17b75626e in read_section \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:556:8                                                                                                   \r\n    #7 0x7ff17b772053 in read_indirect_string \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:730:9                                                                                           \r\n    #8 0x7ff17b772053 in read_attribute_value \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:1189                                                                                            \r\n    #9 0x7ff17b76ebf4 in read_attribute \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:1306:14                                                                                               \r\n    #10 0x7ff17b76ebf4 in find_abstract_instance_name \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:2913                                                                                    \r\n    #11 0x7ff17b76ec98 in find_abstract_instance_name \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:2930:12                                                                                 \r\n    #12 0x7ff17b76ec98 in find_abstract_instance_name \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:2930:12                                                                                 \r\n    [..cut..]\r\n    #252 0x7ff17b76ec98 in find_abstract_instance_name \/var\/tmp\/portage\/sys-devel\/binutils-9999\/work\/binutils\/bfd\/dwarf2.c:2930:12\r\n<\/font><\/pre>\n<p><strong>Affected version:<\/strong><br \/>\n2.29.51.20170921 and maybe past releases<\/p>\n<p><strong>Fixed version:<\/strong><br \/>\nN\/A<\/p>\n<p><strong>Commit fix:<\/strong><br \/>\n<a href=\"https:\/\/sourceware.org\/git\/gitweb.cgi?p=binutils-gdb.git;h=52a93b95ec0771c97e26f0bb28630a271a667bd2\">https:\/\/sourceware.org\/git\/gitweb.cgi?p=binutils-gdb.git;h=52a93b95ec0771c97e26f0bb28630a271a667bd2<\/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-2017-15024<\/p>\n<p><strong>Reproducer:<\/strong><br \/>\n<a href=\"https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00371-binutils-infiniteloop-find_abstract_instance_name\">https:\/\/github.com\/asarubbo\/poc\/blob\/master\/00371-binutils-infiniteloop-find_abstract_instance_name<\/a><\/p>\n<p><strong>Timeline:<\/strong><br \/>\n2017-09-22: bug discovered and reported to upstream<br \/>\n2017-09-24: upstream released a patch<br \/>\n2017-10-03: blog post about the issue<br \/>\n2017-10-04: 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<br \/>\nInfrastructure Initiative<\/a>.<\/p>\n<p><strong>Permalink:<\/strong><\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"NWVMvqakET\"><p><a href=\"http:\/\/blogs.gentoo.org\/ago\/2017\/10\/03\/binutils-infinite-loop-in-find_abstract_instance_name-dwarf2-c\/\">binutils: infinite loop in find_abstract_instance_name (dwarf2.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\/10\/03\/binutils-infinite-loop-in-find_abstract_instance_name-dwarf2-c\/embed\/#?secret=NWVMvqakET\" data-secret=\"NWVMvqakET\" width=\"600\" height=\"338\" title=\"&#8220;binutils: infinite loop in find_abstract_instance_name (dwarf2.c)&#8221; &#8212; agostino&#039;s blog\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Description: binutils is a set of tools necessary to build programs. The relevant ASan output of the issue: # nm -A -a -l -S -s &#8211;special-syms &#8211;synthetic &#8211;with-symbol-versions -D $FILE ==22616==ERROR: AddressSanitizer: stack-overflow on address 0x7ffc2948efe8 (pc 0x0000004248eb bp 0x7ffc2948f8e0 &hellip; <a href=\"https:\/\/blogs.gentoo.org\/ago\/2017\/10\/03\/binutils-infinite-loop-in-find_abstract_instance_name-dwarf2-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-Bq","_links":{"self":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/2320"}],"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=2320"}],"version-history":[{"count":2,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/2320\/revisions"}],"predecessor-version":[{"id":2344,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/posts\/2320\/revisions\/2344"}],"wp:attachment":[{"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/media?parent=2320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/categories?post=2320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/ago\/wp-json\/wp\/v2\/tags?post=2320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}