/usr/include/CLHEP/Random/ is in libclhep-dev 2.1.2.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/CLHEP/Random/DRand48Engine.h
/usr/include/CLHEP/Random/DoubConv.hh
/usr/include/CLHEP/Random/DualRand.h
/usr/include/CLHEP/Random/EngineFactory.h
/usr/include/CLHEP/Random/Hurd160Engine.h
/usr/include/CLHEP/Random/Hurd288Engine.h
/usr/include/CLHEP/Random/JamesRandom.h
/usr/include/CLHEP/Random/MTwistEngine.h
/usr/include/CLHEP/Random/NonRandomEngine.h
/usr/include/CLHEP/Random/RandBinomial.h
/usr/include/CLHEP/Random/RandBinomial.icc
/usr/include/CLHEP/Random/RandBit.h
/usr/include/CLHEP/Random/RandBit.icc
/usr/include/CLHEP/Random/RandBreitWigner.h
/usr/include/CLHEP/Random/RandBreitWigner.icc
/usr/include/CLHEP/Random/RandChiSquare.h
/usr/include/CLHEP/Random/RandChiSquare.icc
/usr/include/CLHEP/Random/RandEngine.h
/usr/include/CLHEP/Random/RandExponential.h
/usr/include/CLHEP/Random/RandExponential.icc
/usr/include/CLHEP/Random/RandFlat.h
/usr/include/CLHEP/Random/RandFlat.icc
/usr/include/CLHEP/Random/RandGamma.h
/usr/include/CLHEP/Random/RandGamma.icc
/usr/include/CLHEP/Random/RandGauss.h
/usr/include/CLHEP/Random/RandGauss.icc
/usr/include/CLHEP/Random/RandGaussQ.h
/usr/include/CLHEP/Random/RandGaussQ.icc
/usr/include/CLHEP/Random/RandGaussT.h
/usr/include/CLHEP/Random/RandGaussT.icc
/usr/include/CLHEP/Random/RandGeneral.h
/usr/include/CLHEP/Random/RandGeneral.icc
/usr/include/CLHEP/Random/RandLandau.h
/usr/include/CLHEP/Random/RandLandau.icc
/usr/include/CLHEP/Random/RandPoisson.h
/usr/include/CLHEP/Random/RandPoisson.icc
/usr/include/CLHEP/Random/RandPoissonQ.h
/usr/include/CLHEP/Random/RandPoissonQ.icc
/usr/include/CLHEP/Random/RandPoissonT.h
/usr/include/CLHEP/Random/RandPoissonT.icc
/usr/include/CLHEP/Random/RandSkewNormal.h
/usr/include/CLHEP/Random/RandSkewNormal.icc
/usr/include/CLHEP/Random/RandStudentT.h
/usr/include/CLHEP/Random/RandStudentT.icc
/usr/include/CLHEP/Random/Random.h
/usr/include/CLHEP/Random/Random.icc
/usr/include/CLHEP/Random/RandomEngine.h
/usr/include/CLHEP/Random/RandomEngine.icc
/usr/include/CLHEP/Random/RandomFunc.h
/usr/include/CLHEP/Random/Randomize.h
/usr/include/CLHEP/Random/RanecuEngine.h
/usr/include/CLHEP/Random/Ranlux64Engine.h
/usr/include/CLHEP/Random/RanluxEngine.h
/usr/include/CLHEP/Random/RanshiEngine.h
/usr/include/CLHEP/Random/SeedTable.h
/usr/include/CLHEP/Random/Stat.h
/usr/include/CLHEP/Random/StaticRandomStates.h
/usr/include/CLHEP/Random/TripleRand.h
/usr/include/CLHEP/Random/defs.h
/usr/include/CLHEP/Random/engineIDulong.h
/usr/include/CLHEP/RandomObjects/RandMultiGauss.h
/usr/include/CLHEP/RandomObjects/RandomVector.h
/usr/include/CLHEP/RandomObjects/RandomVector.icc
/usr/include/CLHEP/RandomObjects/defs.h