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  1. Commons BCEL
  2. BCEL-310

ArrayIndexOutOfBounds in Verifier Pass 3A

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 6.2
    • Fix Version/s: None
    • Component/s: Verifier
    • Labels:
      None

      Description

      Verifier throws OOB on malformed input instead of reporting verification failure.

      Steps to reproduce:

       

      Save the attached file as "Hello.class" and run:

      java -cp <classpath> org.apache.bcel.verifier.Verifier Hello

       

      The file Hello.class was generated automatically by the fuzzer JQF (https://github.com/rohanpadhye/jqf).

      Expected output:

      VERIFIED_REJECTED

      Observed output:

      JustIce by Enver Haase, (C) 2001-2002.

      <http://bcel.sourceforge.net>

      <http://commons.apache.org/bcel>

       

      Now verifying: Hello

       

      Pass 1:

      VERIFIED_OK

      Passed verification.

       

      Pass 2:

      VERIFIED_OK

      Passed verification.

       

      Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -73

      at org.apache.bcel.Const.getTypeName(Const.java:1799)

      at org.apache.bcel.generic.NEWARRAY.toString(NEWARRAY.java:90)

      at org.apache.bcel.generic.Instruction.toString(Instruction.java:101)

      at java.lang.String.valueOf(String.java:2994)

      at java.lang.StringBuilder.append(StringBuilder.java:131)

      at org.apache.bcel.verifier.statics.Pass3aVerifier$InstOperandConstraintVisitor.constraintViolated(Pass3aVerifier.java:499)

      at org.apache.bcel.verifier.statics.Pass3aVerifier$InstOperandConstraintVisitor.visitNEWARRAY(Pass3aVerifier.java:835)

      at org.apache.bcel.generic.NEWARRAY.accept(NEWARRAY.java:125)

      at org.apache.bcel.generic.InstructionHandle.accept(InstructionHandle.java:302)

      at org.apache.bcel.verifier.statics.Pass3aVerifier.pass3StaticInstructionOperandsChecks(Pass3aVerifier.java:443)

      at org.apache.bcel.verifier.statics.Pass3aVerifier.do_verify(Pass3aVerifier.java:208)

      at org.apache.bcel.verifier.PassVerifier.verify(PassVerifier.java:71)

      at org.apache.bcel.verifier.Verifier.doPass3a(Verifier.java:8

        Attachments

        1. Hello.class
          1.0 kB
          Rohan Padhye

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              rohanpadhye Rohan Padhye
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              Dates

              • Created:
                Updated: