libming:null pointer dereference in stackswap

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 null pointer dereference vulnerability was found in function stackswap in decompile.c, which allows attackers to cause a denial of service via a crafted file.

#swftocxx $FILE out
=================================================================
SEGV on unknown address 0x000000000000 (pc 0x000000545058 bp 0x603000000160 sp 0x7fffce29b5b0 T0)
==17155==The signal is caused by a READ memory access.
==17155==Hint: address points to the zero page.
    #0 0x545057 in stackswap /home/haojun/Downloads/libming-master/util/decompile.c:629:29
    #1 0x545057 in decompileSTACKSWAP /home/haojun/Downloads/libming-master/util/decompile.c:1344
    #2 0x545057 in decompileAction /home/haojun/Downloads/libming-master/util/decompile.c:3159
    #3 0x5875eb in decompileActions /home/haojun/Downloads/libming-master/util/decompile.c:3401:6
    #4 0x5875eb in decompile5Action /home/haojun/Downloads/libming-master/util/decompile.c:3423
    #5 0x52a0c5 in outputSWF_DOACTION /home/haojun/Downloads/libming-master/util/outputscript.c:1548:29
    #6 0x531311 in readMovie /home/haojun/Downloads/libming-master/util/main.c:277:4
    #7 0x531311 in main /home/haojun/Downloads/libming-master/util/main.c:350
    #8 0x7fd51244fb34 in __libc_start_main /usr/src/debug/glibc-2.17-c758a686/csu/../csu/libc-start.c:274
    #9 0x41ae7b in _start (/home/haojun/Downloads/libming-afl-build/bin/swftocxx+0x41ae7b)

SEGV /home/haojun/Downloads/libming-master/util/decompile.c:629:29 in stackswap
==17155==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/libmingnull-pointer-dereference-in.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/libqpdf/QP
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 - ==52056== stack-overflow on address 0x7ffc5d511de0 (pc 0x0000005c262c bp 0x7ffc5d512a30 sp 0x7ffc5d511de0 T0) #0 0x5c262b in QPDF::resolveObjectsInStream(int) /home/haojun/Downloads/qpdf-master/libqpdf/QPDF.cc:1497 #1 0x5c13b6 in QPDF::resolve(int, int) /home/haojun/Downloads/qpdf-master/libqpdf/QPDF.cc:1480:6 #2 0x61e6c1 in QPDF::Resolver::resolve(QPDF*, int, int) /home/haojun/Downloads/qpdf-master/include/qpdf/QPDF.hh:520:19 #3 0x61e6c1 in QPDFObjectHandle::dereference() /home/haojun/Downloads/qpdf-master/libqpdf/QPDFObjectHandle.cc:1520 #4 0x621e00 in QPDFObjectHandle::isStream() /home/haojun/Downloads/qpdf-master/libqpdf/QPDFObjectHandle.cc:226:5 #5 0x5c27ce in QPDF::resolveObjectsInStream(int) /home/haojun/Downl
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 - ==29487== stack-overflow on address 0x7fff5e6b1e38 (pc 0x0000005187d2 bp 0x7fff5e6b2680 sp 0x7fff5e6b1e10 T0) #0 0x5187d1 in operator new(unsigned long) /home/haojun/Downloads/llvm-clang/llvm/projects/compiler-rt/lib/asan/asan_new_delete.cc:82 #1 0x65e604 in PointerHolder<QPDFObject>::PointerHolder(QPDFObject*, bool) /home/haojun/Downloads/qpdf-master/include/qpdf/PointerHolder.hh:75:17 #2 0x65e604 in QPDFObjectHandle::QPDFObjectHandle(QPDF*, int, int) /home/haojun/Downloads/qpdf-master/libqpdf/QPDFObjectHandle.cc:45 #3 0x65e604 in QPDFObjectHandle::newIndirect(QPDF*, int, int) /home/haojun/Downloads/qpdf-master/libqpdf/QPDFObjectHandle.cc:1093 #4 0x5c27bf in QPDFObjectHandle::Factory::newIndirect(QPDF*, int, int)
阅读全文