[Nasm-bugs] [Bug 3392477] New: ndisasm out of bounds read

noreply-nasm at gorcunov.org noreply-nasm at gorcunov.org
Tue May 1 07:45:43 PDT 2018


            Bug ID: 3392477
           Summary: ndisasm out of bounds read
           Product: NASM
           Version: 2.13.xx
          Hardware: All
                OS: All
            Status: OPEN
          Severity: normal
          Priority: Medium
         Component: Disassembler
          Assignee: nobody at nasm.us
          Reporter: rui at deniable.org
                CC: gorcunov at gmail.com, hpa at zytor.com, nasm-bugs at nasm.us
     Obtained from: Build from source archive using configure

Created attachment 411639
  --> https://bugzilla.nasm.us/attachment.cgi?id=411639&action=edit
crash file and reports

Hi, for the past couple of days I've been fuzzing ndisasm (2.13.03) with ASAN 
and I found a buffer over-read. I attached a zip file (password 
is 'nasm') with the file to reproduce the issue, plus a file with the ASAN (and
Valgrind) report containing the stack strace and line of code where th
e bug lies.

Let me know if you need more information.

Thank you.

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