libming:heap buffer overflow in dcputs

Description

Ming is a library for generating Macromedia Flash files (.swf), written in C, and  for working includes useful utilities king with .swf files.

A heap buffer overflow vulnerability was found in function dcputs in decompile.c, which allows attackers to cause a denial of service via a crafted file.

#swftocxx $FILE out
=================================================================
heap-buffer-overflow on address 0x7fe82faff800 at pc 0x00000047d145 bp 0x7ffe86b6c620 sp 0x7ffe86b6bdd0
WRITE of size 45 at 0x7fe82faff800 thread T0
    #0 0x47d144 in __interceptor_strcat /home/haojun/Downloads/llvm-clang/llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:491
    #1 0x5459fa in dcputs /home/haojun/Downloads/libming-master/util/decompile.c:104:2
    #2 0x5459fa in decompileIMPLEMENTS /home/haojun/Downloads/libming-master/util/decompile.c:3094
    #3 0x5459fa in decompileAction /home/haojun/Downloads/libming-master/util/decompile.c:3375
    #4 0x5875eb in decompileActions /home/haojun/Downloads/libming-master/util/decompile.c:3401:6
    #5 0x5875eb in decompile5Action /home/haojun/Downloads/libming-master/util/decompile.c:3423
    #6 0x52a0c5 in outputSWF_DOACTION /home/haojun/Downloads/libming-master/util/outputscript.c:1548:29
    #7 0x531311 in readMovie /home/haojun/Downloads/libming-master/util/main.c:277:4
    #8 0x531311 in main /home/haojun/Downloads/libming-master/util/main.c:350
    #9 0x7fe83201bb34 in __libc_start_main /usr/src/debug/glibc-2.17-c758a686/csu/../csu/libc-start.c:274
    #10 0x41ae7b in _start (/home/haojun/Downloads/libming-afl-build/bin/swftocxx+0x41ae7b)

0x7fe82faff800 is located 0 bytes to the right of 327680-byte region [0x7fe82faaf800,0x7fe82faff800)
allocated by thread T0 here:
    #0 0x4e012d in realloc /home/haojun/Downloads/llvm-clang/llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:79
    #1 0x545984 in dcchkstr /home/haojun/Downloads/libming-master/util/decompile.c:92:9
    #2 0x545984 in dcputs /home/haojun/Downloads/libming-master/util/decompile.c:103
    #3 0x545984 in decompileIMPLEMENTS /home/haojun/Downloads/libming-master/util/decompile.c:3094
    #4 0x545984 in decompileAction /home/haojun/Downloads/libming-master/util/decompile.c:3375

heap-buffer-overflow /home/haojun/Downloads/llvm-clang/llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:491 in __interceptor_strcat
Shadow bytes around the buggy address:
  0x0ffd85f57eb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffd85f57ec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffd85f57ed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffd85f57ee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ffd85f57ef0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0ffd85f57f00:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ffd85f57f10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ffd85f57f20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ffd85f57f30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ffd85f57f40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ffd85f57f50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==16605==ABORTING

Affected version: latest version
Fixed version:N/A
Commit fix:N/A
Credit: ADLab of Venustech.
CVE:N/A
Reproducer:
Timeline:
2017-06-07:bug discovered and reported to the libming GitHub issue page
2017-07-24:blog post about the issue
Permalink:
https://somevulnsofadlab.blogspot.com/2017/07/libmingheap-buffer-overflow-in-dcputs.html

评论

发表评论

此博客中的热门博文

qpdf:An infinite loop in libqpdf

Description QPDF  is a command-line program that does structural, content-preserving transformations on PDF files. An infinite loop was found in libqpdf, which allows attackers to cause a denial of service via a crafted file. #qpdf $FILE - ==10354== stack-overflow on address 0x7fffdaf46ef8 (pc 0x7fc995a7f020 bp 0x000000935760 sp 0x7fffdaf46e50 T0) #0 0x7fc995a7f01f in pcre_compile2 pcre_compile.c:7903 #1 0x8adacb in PCRE::PCRE(char const*, int) /home/haojun/Downloads/qpdf-master/libqpdf/PCRE.cc:144:18 #2 0x67d604 in QPDFTokenizer::resolveLiteral() /home/haojun/Downloads/qpdf-master/libqpdf/QPDFTokenizer.cc:62:10 #3 0x6835cb in QPDFTokenizer::presentCharacter(char) /home/haojun/Downloads/qpdf-master/libqpdf/QPDFTokenizer.cc:432:9 #4 0x688d3f in QPDFTokenizer::readToken(PointerHolder<InputSource>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /home/haojun/Downloads/qpdf-master/l...
阅读全文

libming:heap buffer overflow in decompileIF

Description Ming  is a library for generating Macromedia Flash files (.swf), written in C, and   for working includes useful utilities king with .swf files. A heap buffer overflow was found in function   decompileIF  in  decompile.c , which allows attackers to cause a denial of service via a crafted file. #swftocxx $FILE out ================================================================= heap-buffer-overflow on address 0x6020000000a0 at pc 0x000000570171 bp 0x7fffe4c1cbe0 sp 0x7fffe4c1cbd8 READ of size 1 at 0x6020000000a0 thread T0 #0 0x570170 in decompileIF /home/haojun/Downloads/libming-master/util/decompile.c:2369:79 #1 0x5875eb in decompileActions /home/haojun/Downloads/libming-master/util/decompile.c:3401:6 #2 0x5875eb in decompile5Action /home/haojun/Downloads/libming-master/util/decompile.c:3423 #3 0x52a0c5 in outputSWF_DOACTION /home/haojun/Downloads/libming-master/util/outputscript.c:1548:29 #4 0x531311 in read...
阅读全文

qpdf:An infinite loop in libqpdf

Description QPDF  is a command-line program that does structural, content-preserving transformations on PDF files. An infinite loop was found in libqpdf, which allows attackers to cause a denial of service via a crafted file. #qpdf $FILE - ==40517== stack-overflow on address 0x7ffd3e389d38 (pc 0x00000046b469 bp 0x7ffd3e38a5c0 sp 0x7ffd3e389d40 T0) #0 0x46b468 in memmove /home/haojun/Downloads/llvm-clang/llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:679 #1 0x7f866291704d /usr/include/bits/string3.h:57 #2 0x7f866291704d pcre_compile.c:3918 #3 0x7f866291704d pcre_compile.c:7273 #4 0x7f8662916e25 pcre_compile.c:6635 #5 0x7f8662916e25 pcre_compile.c:7273 #6 0x7f8662916e25 pcre_compile.c:6635 #7 0x7f8662916e25 pcre_compile.c:7273 #8 0x7f866291c5c5 in pcre_compile2 pcre_compile.c:8131 #9 0x8adacb in PCRE::PCRE(char const*, int) /home/haojun/Downloads/qpdf-master/libqpdf/PCRE.cc:144:18 ...
阅读全文