Release 2.4.2

This release introduces several vulnerability fixes:

• Fixes a heap buffer overflow in RaggedBinCount (CVE-2021-29512)
• Fixes a heap out of bounds write in RaggedBinCount (CVE-2021-29514)
• Fixes a type confusion during tensor casts which leads to dereferencing null pointers (CVE-2021-29513)
• Fixes a reference binding to null pointer in MatrixDiag* ops (CVE-2021-29515)
• Fixes a null pointer dereference via invalid Ragged Tensors (CVE-2021-29516)
• Fixes a division by zero in Conv3D (CVE-2021-29517)
• Fixes vulnerabilities where session operations in eager mode lead to null pointer dereferences (CVE-2021-29518)
• Fixes a CHECK-fail in SparseCross caused by type confusion (CVE-2021-29519)
• Fixes a segfault in SparseCountSparseOutput (CVE-2021-29521)
• Fixes a heap buffer overflow in Conv3DBackprop* (CVE-2021-29520)
• Fixes a division by 0 in Conv3DBackprop* (CVE-2021-29522)
• Fixes a CHECK-fail in AddManySparseToTensorsMap (CVE-2021-29523)
• Fixes a division by 0 in Conv2DBackpropFilter (CVE-2021-29524)
• Fixes a division by 0 in Conv2DBackpropInput (CVE-2021-29525)
• Fixes a division by 0 in Conv2D (CVE-2021-29526)
• Fixes a division by 0 in QuantizedConv2D (CVE-2021-29527)
• Fixes a division by 0 in QuantizedMul (CVE-2021-29528)
• Fixes vulnerabilities caused by invalid validation in SparseMatrixSparseCholesky (CVE-2021-29530)
• Fixes a heap buffer overflow caused by rounding (CVE-2021-29529)
• Fixes a CHECK-fail in tf.raw_ops.EncodePng (CVE-2021-29531)
• Fixes a heap out of bounds read in RaggedCross (CVE-2021-29532)
• Fixes a CHECK-fail in DrawBoundingBoxes (CVE-2021-29533)
• Fixes a heap buffer overflow in QuantizedMul (CVE-2021-29535)
• Fixes a CHECK-fail in SparseConcat (CVE-2021-29534)
• Fixes a heap buffer overflow in QuantizedResizeBilinear (CVE-2021-29537)
• Fixes a heap buffer overflow in QuantizedReshape (CVE-2021-29536)
• Fixes a division by zero in Conv2DBackpropFilter (CVE-2021-29538)
• Fixes a heap buffer overflow in Conv2DBackpropFilter (CVE-2021-29540)
• Fixes a heap buffer overflow in StringNGrams (CVE-2021-29542)
• Fixes a null pointer dereference in StringNGrams (CVE-2021-29541)
• Fixes a CHECK-fail in QuantizeAndDequantizeV4Grad (CVE-2021-29544)
• Fixes a CHECK-fail in CTCGreedyDecoder (CVE-2021-29543)
• Fixes a heap buffer overflow in SparseTensorToCSRSparseMatrix (CVE-2021-29545)
• Fixes a division by 0 in QuantizedBiasAdd (CVE-2021-29546)
• Fixes a heap out of bounds in QuantizedBatchNormWithGlobalNormalization (CVE-2021-29547)
• Fixes a division by 0 in QuantizedBatchNormWithGlobalNormalization (CVE-2021-29548)
• Fixes a division by 0 in QuantizedAdd (CVE-2021-29549)
• Fixes a division by 0 in FractionalAvgPool (CVE-2021-29550)
• Fixes an OOB read in MatrixTriangularSolve (CVE-2021-29551)
• Fixes a heap OOB in QuantizeAndDequantizeV3 (CVE-2021-29553)
• Fixes a CHECK-failure in UnsortedSegmentJoin (CVE-2021-29552)
• Fixes a division by 0 in DenseCountSparseOutput (CVE-2021-29554)
• Fixes a division by 0 in FusedBatchNorm (CVE-2021-29555)
• Fixes a division by 0 in SparseMatMul (CVE-2021-29557)
• Fixes a division by 0 in Reverse (CVE-2021-29556)
• Fixes a heap buffer overflow in SparseSplit (CVE-2021-29558)
• Fixes a heap OOB access in unicode ops (CVE-2021-29559)
• Fixes a heap buffer overflow in RaggedTensorToTensor (CVE-2021-29560)
• Fixes a CHECK-fail in LoadAndRemapMatrix (CVE-2021-29561)
• Fixes a CHECK-fail in tf.raw_ops.IRFFT (CVE-2021-29562)
• Fixes a CHECK-fail in tf.raw_ops.RFFT (CVE-2021-29563)
• Fixes a null pointer dereference in EditDistance (CVE-2021-29564)
• Fixes a null pointer dereference in SparseFillEmptyRows (CVE-2021-29565)
• Fixes a heap OOB access in Dilation2DBackpropInput (CVE-2021-29566)
• Fixes a reference binding to null in ParameterizedTruncatedNormal (CVE-2021-29568)
• Fixes a set of vulnerabilities caused by lack of validation in SparseDenseCwiseMul (CVE-2021-29567)
• Fixes a heap out of bounds read in MaxPoolGradWithArgmax (CVE-2021-29570)
• Fixes a heap out of bounds read in RequantizationRange (CVE-2021-29569)
• Fixes a memory corruption in DrawBoundingBoxesV2 (CVE-2021-29571)
• Fixes a reference binding to nullptr in SdcaOptimizer (CVE-2021-29572)
• Fixes an overflow and a denial of service in tf.raw_ops.ReverseSequence (CVE-2021-29575)
• Fixes a division by 0 in MaxPoolGradWithArgmax (CVE-2021-29573)
• Fixes an undefined behavior in MaxPool3DGradGrad (CVE-2021-29574)
• Fixes a heap buffer overflow in MaxPool3DGradGrad (CVE-2021-29576)
• Fixes a heap buffer overflow in AvgPool3DGrad (CVE-2021-29577)
• Fixes an undefined behavior and a CHECK-fail in FractionalMaxPoolGrad (CVE-2021-29580)
• Fixes a heap buffer overflow in FractionalAvgPoolGrad (CVE-2021-29578)
• Fixes a heap buffer overflow in MaxPoolGrad (CVE-2021-29579)
• Fixes a segfault in CTCBeamSearchDecoder (CVE-2021-29581)
• Fixes a heap OOB read in tf.raw_ops.Dequantize (CVE-2021-29582)
• Fixes a CHECK-fail due to integer overflow (CVE-2021-29584)
• Fixes a heap buffer overflow and undefined behavior in FusedBatchNorm (CVE-2021-29583)
• Fixes a division by zero in padding computation in TFLite (CVE-2021-29585)
• Fixes a division by zero in optimized pooling implementations in TFLite (CVE-2021-29586)
• Fixes a division by zero in TFLite's implementation of SpaceToDepth (CVE-2021-29587)
• Fixes a division by zero in TFLite's implementation of GatherNd (CVE-2021-29589)
• Fixes a division by zero in TFLite's implementation of TransposeConv (CVE-2021-29588)
• Fixes a heap OOB read in TFLite's implementation of Minimum or Maximum (CVE-2021-29590)
• Fixes a null pointer dereference in TFLite's Reshape operator (CVE-2021-29592)
• Fixes a stack overflow due to looping TFLite subgraph (CVE-2021-29591)
• Fixes a division by zero in TFLite's implementation of DepthToSpace (CVE-2021-29595)
• Fixes a division by zero in TFLite's convolution code (CVE-2021-29594)
• Fixes a division by zero in TFLite's implementation of EmbeddingLookup (CVE-2021-29596)
• Fixes a division by zero in TFLite's implementation of BatchToSpaceNd (CVE-2021-29593)
• Fixes a division by zero in TFLite's implementation of SpaceToBatchNd (CVE-2021-29597)
• Fixes a division by zero in TFLite's implementation of SVDF (CVE-2021-29598)
• Fixes a division by zero in TFLite's implementation of Split (CVE-2021-29599)
• Fixes a division by zero in TFLite's implementation of OneHot (CVE-2021-29600)
• Fixes a division by zero in TFLite's implementation of DepthwiseConv (CVE-2021-29602)
• Fixes a division by zero in TFLite's implementation of hashtable lookup (CVE-2021-29604)
• Fixes a integer overflow in TFLite concatentation (CVE-2021-29601)
• Fixes a integer overflow in TFLite memory allocation (CVE-2021-29605)
• Fixes a heap OOB write in TFLite (CVE-2021-29603)
• Fixes a heap OOB read in TFLite (CVE-2021-29606)
• Fixes a heap OOB and null pointer dereference in RaggedTensorToTensor (CVE-2021-29608)
• Fixes vulnerabilities caused by incomplete validation in SparseAdd (CVE-2021-29609)
• Fixes vulnerabilities caused by incomplete validation in SparseSparseMinimum (CVE-2021-29607)
• Fixes vulnerabilities caused by incomplete validation in SparseReshape (CVE-2021-29611)
• Fixes vulnerabilities caused by invalid validation in QuantizeAndDequantizeV2 (CVE-2021-29610)
• Fixes a heap buffer overflow in BandedTriangularSolve (CVE-2021-29612)
• Fixes vulnerabilities caused by incomplete validation in tf.raw_ops.CTCLoss (CVE-2021-29613)
• Fixes an interpreter crash from vulnerabilities in tf.io.decode_raw (CVE-2021-29614)
• Fixes a stack overflow in ParseAttrValue with nested tensors (CVE-2021-29615)
• Fixes a null dereference in Grappler's TrySimplify (CVE-2021-29616)
• Fixes a crash in tf.transpose with complex inputs (CVE-2021-29618)
• Fixes a crash in tf.strings.substr due to CHECK-fail (CVE-2021-29617)
• Fixes a segfault in tf.raw_ops.SparseCountSparseOutput (CVE-2021-29619)
• Fixes a segfault in tf.raw_ops.ImmutableConst (CVE-2021-29539)
• Updates curl to 7.76.0 to handle CVE-2020-8169, CVE-2020-8177, CVE-2020-8231, CVE-2020-8284, CVE-2020-8285 and CVE-2020-8286.