Closed Kaka201 closed 3 years ago
os: ubuntu 20.04 htmldoc version: master branch
command : ./htmldoc --webpage -f out.pdf ./poc.html
poc.zip
asan report
================================================================= ==100970==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7ffd98c936be at pc 0x000000605f03 bp 0x7ffd98c93690 sp 0x7ffd98c93688 READ of size 1 at 0x7ffd98c936be thread T0 #0 0x605f02 in image_load_bmp(image_t*, _IO_FILE*, int, int) /home/ubuntu/fuzz/htmldocc/htmldoc/image.cxx:1089:12 #1 0x602b94 in image_load /home/ubuntu/fuzz/htmldocc/htmldoc/image.cxx:831:14 #2 0x53bc18 in write_image(_IO_FILE*, render_str*, int) /home/ubuntu/fuzz/htmldocc/htmldoc/ps-pdf.cxx:10305:5 #3 0x5207fa in pdf_write_document(unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, tree_str*, tree_str*) /home/ubuntu/fuzz/htmldocc/htmldoc/ps-pdf.cxx:2292:7 #4 0x50c977 in pspdf_export /home/ubuntu/fuzz/htmldocc/htmldoc/ps-pdf.cxx:910:7 #5 0x4e1663 in main /home/ubuntu/fuzz/htmldocc/htmldoc/htmldoc.cxx:1291:3 #6 0x7ff2c1e7d0b2 in __libc_start_main /build/glibc-YbNSs7/glibc-2.31/csu/../csu/libc-start.c:308:16 #7 0x41eadd in _start (/home/ubuntu/fuzz/htmldocc/htmldoc/htmldoc+0x41eadd) Address 0x7ffd98c936be is located in stack of thread T0 at offset 30 in frame #0 0x6048ef in image_load_bmp(image_t*, _IO_FILE*, int, int) /home/ubuntu/fuzz/htmldocc/htmldoc/image.cxx:881 This frame has 1 object(s): [32, 1056) 'colormap' (line 894) <== Memory access at offset 30 underflows this variable HINT: this may be a false positive if your program uses some custom stack unwind mechanism, swapcontext or vfork (longjmp and C++ exceptions *are* supported) SUMMARY: AddressSanitizer: stack-buffer-underflow /home/ubuntu/fuzz/htmldocc/htmldoc/image.cxx:1089:12 in image_load_bmp(image_t*, _IO_FILE*, int, int) Shadow bytes around the buggy address: 0x10003318a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a6a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a6b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a6c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x10003318a6d0: 00 00 00 00 f1 f1 f1[f1]00 00 00 00 00 00 00 00 0x10003318a6e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a6f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x10003318a720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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 Shadow gap: cc ==100970==ABORTING
[master f12b966] Fix BMP crash bug (Issue #444)
cve-2021-40985 has been assigned report by luo likang of NSFOCUS TianJi team
os: ubuntu 20.04 htmldoc version: master branch
command : ./htmldoc --webpage -f out.pdf ./poc.html
poc.zip
asan report