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Fix DTLS 1.2 OpenSSL 1.1.1k client fuzzing null exception #201

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Fix DTLS 1.2 OpenSSL 1.1.1k client fuzzing null exception #201

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openssl 1.1.1k client learn logs.txt

I ran the learning for about 4 hours, generated 39 hypotheses, and it was terminated by NonDeterminismException

I will remove context.addStepContext() and run learning again, tomorrow I will update what happend.

@c-southwest
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c-southwest commented May 30, 2025 •
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This time terminated by another exception after generated 19 hypothesis (90 minutes):

03:12:49 [main] ERROR : statefuzzer.core.StateFuzzerStandard - Exception generated during learning
java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
Index 1 out of bounds for length 1
03:12:49 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Finished Experiment
03:12:49 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Number of refinement rounds: 19
03:12:49 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Results stored in output/openssl-1.1.1k_client_dhe_ecdhe_rsa_cert_reneg
java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266)
	at java.base/java.util.Objects.checkIndex(Objects.java:361)
	at java.base/java.util.ArrayList.get(ArrayList.java:427)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsStepContext.lambda$getReceivedMessageRecordPairs$2(TlsStepContext.java:91)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180)
	at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104)
	at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:711)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsStepContext.getReceivedMessageRecordPairs(TlsStepContext.java:92)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsExecutionContext.lambda$getReceivedMessagesAndRecords$5(TlsExecutionContext.java:93)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:178)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsExecutionContext.getReceivedMessagesAndRecords(TlsExecutionContext.java:94)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsExecutionContext.getReceivedMessagesAndRecords(TlsExecutionContext.java:98)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.symbols.inputs.ServerHelloInput.postReceiveUpdate(ServerHelloInput.java:93)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.symbols.inputs.ServerHelloInput.postReceiveUpdate(ServerHelloInput.java:18)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.sul.mapper.mappers.InputMapper.postReceive(InputMapper.java:92)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.sul.mapper.mappers.MapperComposer.doExecute(MapperComposer.java:116)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.sul.mapper.mappers.MapperComposer.execute(MapperComposer.java:96)
	at se.uu.it.dtlsfuzzer.components.sul.core.TlsSul.executeInput(TlsSul.java:310)
	at se.uu.it.dtlsfuzzer.components.sul.core.TlsSul.step(TlsSul.java:281)
	at se.uu.it.dtlsfuzzer.components.sul.core.TlsSul.step(TlsSul.java:48)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.sul.core.sulwrappers.SulProcessWrapper.step(SulProcessWrapper.java:97)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.sul.core.sulwrappers.SulLivenessWrapper.step(SulLivenessWrapper.java:71)
	at de.learnlib.filter.statistic.sul.CounterSUL.step(CounterSUL.java:54)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.sul.core.sulwrappers.TimeoutWrapper.step(TimeoutWrapper.java:68)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.sul.core.sulwrappers.LoggingWrapper.step(LoggingWrapper.java:61)
	at de.learnlib.oracle.membership.SULOracle.answerQuery(SULOracle.java:59)
	at de.learnlib.oracle.membership.SULOracle.answerQuery(SULOracle.java:31)
	at de.learnlib.oracle.MembershipOracle.answerQuery(MembershipOracle.java:40)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.learner.oracles.NonDeterminismRetryingSULOracle.processQuery(NonDeterminismRetryingSULOracle.java:49)
	at de.learnlib.oracle.MembershipOracle.answerQuery(MembershipOracle.java:46)
	at de.learnlib.oracle.MembershipOracle.answerQuery(MembershipOracle.java:40)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.learner.oracles.CachingSULOracle.processQueries(CachingSULOracle.java:75)
	at de.learnlib.oracle.MembershipOracle.processQuery(MembershipOracle.java:62)
	at com.github.protocolfuzzing.protocolstatefuzzer.components.learner.oracles.LoggingSULOracle.processQueries(LoggingSULOracle.java:71)
	at de.learnlib.algorithm.ttt.mealy.TTTLearnerMealy.initTransitions(TTTLearnerMealy.java:84)
	at de.learnlib.algorithm.ttt.base.AbstractTTTLearner.initializeState(AbstractTTTLearner.java:200)
	at de.learnlib.algorithm.ttt.base.AbstractTTTLearner.makeTree(AbstractTTTLearner.java:872)
	at de.learnlib.algorithm.ttt.base.AbstractTTTLearner.addNewStates(AbstractTTTLearner.java:860)
	at de.learnlib.algorithm.ttt.base.AbstractTTTLearner.closeTransitions(AbstractTTTLearner.java:791)
	at de.learnlib.algorithm.ttt.base.AbstractTTTLearner.refineHypothesisSingle(AbstractTTTLearner.java:242)
	at de.learnlib.algorithm.ttt.mealy.TTTLearnerMealy.refineHypothesisSingle(TTTLearnerMealy.java:92)
	at de.learnlib.algorithm.ttt.base.AbstractTTTLearner.refineHypothesis(AbstractTTTLearner.java:177)
	at com.github.protocolfuzzing.protocolstatefuzzer.statefuzzer.core.StateFuzzerStandard.inferStateMachine(StateFuzzerStandard.java:164)
	at com.github.protocolfuzzing.protocolstatefuzzer.statefuzzer.core.StateFuzzerStandard.startFuzzing(StateFuzzerStandard.java:84)
	at com.github.protocolfuzzing.protocolstatefuzzer.entrypoints.CommandLineParser.executeCommand(CommandLineParser.java:355)
	at com.github.protocolfuzzing.protocolstatefuzzer.entrypoints.CommandLineParser.parseAndExecuteCommand(CommandLineParser.java:226)
	at com.github.protocolfuzzing.protocolstatefuzzer.entrypoints.CommandLineParser.parse(CommandLineParser.java:168)
	at com.github.protocolfuzzing.protocolstatefuzzer.entrypoints.CommandLineParser.parse(CommandLineParser.java:212)
	at se.uu.it.dtlsfuzzer.Main.main(Main.java:20)

@c-southwest
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c-southwest commented May 30, 2025 •
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@kostis I checked out the commit da2466b, which commit is just before we merge DTLS 1.3 related code, and still have the same Exception. (I deleted PSF and TLS-Attacker folder, executed ./install.sh again)

I will run experiments again, for before and after key commits, such as

15:12:39 [main] WARN  : record.cipher.RecordBlockCipher - Setting clean bytes to protocol message bytes.
15:12:39 [main] WARN  : record.crypto.RecordDecryptor - Failed to decrypt record, will try to process with previous cipher
15:12:39 [main] WARN  : record.cipher.RecordBlockCipher - Could not find all components (plaintext, mac, padding) in plaintext record.
15:12:39 [main] WARN  : record.cipher.RecordBlockCipher - This is probably us having the wrong keys. Depending on the application this may be fine.
15:12:39 [main] WARN  : record.cipher.RecordBlockCipher - Setting clean bytes to protocol message bytes.
15:12:39 [main] ERROR : statefuzzer.core.StateFuzzerStandard - Exception generated during learning
java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
Index 1 out of bounds for length 1
15:12:39 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Finished Experiment
15:12:39 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Number of refinement rounds: 16
15:12:39 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Results stored in output/openssl-1.1.1k_client_dhe_ecdhe_rsa_cert_reneg
java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266)
	at java.base/java.util.Objects.checkIndex(Objects.java:361)
	at java.base/java.util.ArrayList.get(ArrayList.java:427)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsStepContext.lambda$getReceivedMessageRecordPairs$2(TlsStepContext.java:91)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180)
	at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104)
	at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:711)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsStepContext.getReceivedMessageRecordPairs(TlsStepContext.java:92)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsExecutionContext.lambda$getReceivedMessagesAndRecords$5(TlsExecutionContext.java:93)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:178)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsExecutionContext.getReceivedMessagesAndRecords(TlsExecutionContext.java:94)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.TlsExecutionContext.getReceivedMessagesAndRecords(TlsExecutionContext.java:98)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.symbols.inputs.ServerHelloInput.postReceiveUpdate(ServerHelloInput.java:76)
	at se.uu.it.dtlsfuzzer.components.sul.mapper.symbols.inputs.ServerHelloInput.postReceiveUpdate(ServerHelloInput.java:18)

@c-southwest
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c-southwest commented May 30, 2025 •
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I checked out very early commit 8893778, just before we upgrade TLS-Attacker version from 5.3.0 to 6.3.4, and still has exception after 85 minutes with 14 hypotheses.

Before I run ./install.sh, I deleted maven local cache rm -rf ~/.m2/repository and deleted PSF and TLS-Attacker folder, so the environment should be clean.

20:16:49 [main] WARN  : record.crypto.RecordDecryptor - Failed to decrypt record, will try to process with previous cipher
20:16:50 [main] WARN  : record.crypto.RecordDecryptor - Failed to decrypt record, will try to process with previous cipher
20:16:50 [main] ERROR : statefuzzer.core.StateFuzzerStandard - Exception generated during learning
java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
20:16:50 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Finished Experiment
20:16:50 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Number of refinement rounds: 14
20:16:50 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Results stored in output/openssl-1.1.1k_client_dhe_ecdhe_rsa_cert_reneg

@c-southwest
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I checked out commit d9515f9, and still get exception after 3 hours with 36 hypotheses.

23:54:15 [main] WARN  : record.crypto.RecordDecryptor - Failed to decrypt record, will try to process with previous cipher
23:54:15 [main] ERROR : statefuzzer.core.StateFuzzerStandard - Exception generated during learning
java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
23:54:15 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Finished Experiment
23:54:15 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Number of refinement rounds: 36
23:54:15 [main] INFO  : statefuzzer.core.StateFuzzerStandard - Results stored in output/openssl-1.1.1k_client_dhe_ecdhe_rsa_cert_reneg

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