#fixed code
                             static Model process(Model model, Properties properties) {
		if (properties != null) {
			Set<String> exclusions = new HashSet<>();
			for (String name : properties.stringPropertyNames()) {
				if (name.startsWith("boms.")) {
					String bom = properties.getProperty(name);
					DefaultArtifact artifact = artifact(bom);
					if (model.getDependencyManagement() == null) {
						model.setDependencyManagement(new DependencyManagement());
					}
					boolean replaced = false;
					for (Dependency dependency : model.getDependencyManagement()
							.getDependencies()) {
						if (ObjectUtils.nullSafeEquals(artifact.getArtifactId(),
								dependency.getArtifactId())
								&& ObjectUtils.nullSafeEquals(artifact.getGroupId(),
										dependency.getGroupId())) {
							dependency.setVersion(artifact.getVersion());
						}
					}
					if (isParentBom(model, artifact)) {
						model.getParent().setVersion(artifact.getVersion());
						replaced = true;
					}
					if (!replaced) {
						model.getDependencyManagement().addDependency(bom(artifact));
					}
				}
				else if (name.startsWith("dependencies.")) {
					String pom = properties.getProperty(name);
					DefaultArtifact artifact = artifact(pom);
					boolean replaced = false;
					for (Dependency dependency : model.getDependencies()) {
						if (ObjectUtils.nullSafeEquals(artifact.getArtifactId(),
								dependency.getArtifactId())
								&& ObjectUtils.nullSafeEquals(artifact.getGroupId(),
										dependency.getGroupId())
								&& artifact.getVersion() != null) {
							dependency.setVersion(
									StringUtils.hasLength(artifact.getVersion())
											? artifact.getVersion()
											: null);
							dependency.setScope("runtime");
							replaced = true;
						}
					}
					if (!replaced) {
						model.getDependencies().add(dependency(artifact));
					}
				}
				else if (name.startsWith("exclusions.")) {
					String pom = properties.getProperty(name);
					exclusions.add(pom);
				}
			}
			for (String pom : exclusions) {
				Exclusion exclusion = exclusion(pom);
				Dependency target = dependency(artifact(pom));
				Dependency excluded = null;
				for (Dependency dependency : model.getDependencies()) {
					dependency.addExclusion(exclusion);
					if (dependency.getGroupId().equals(target.getGroupId()) && dependency
							.getArtifactId().equals(target.getArtifactId())) {
						excluded = dependency;
					}
				}
				if (excluded != null) {
					model.getDependencies().remove(excluded);
				}
			}
		}
		for (Dependency dependency : new ArrayList<>(model.getDependencies())) {
			if ("test".equals(dependency.getScope())
					|| "provided".equals(dependency.getScope())) {
				model.getDependencies().remove(dependency);
			}
		}
		return model;
	}
#vulnerable code 
                             static Model process(Model model, Properties properties) {
		if (properties != null) {
			Set<String> exclusions = new HashSet<>();
			for (String name : properties.stringPropertyNames()) {
				if (name.startsWith("boms.")) {
					String bom = properties.getProperty(name);
					DefaultArtifact artifact = artifact(bom);
					if (model.getDependencyManagement() == null) {
						model.setDependencyManagement(new DependencyManagement());
					}
					boolean replaced = false;
					for (Dependency dependency : model.getDependencyManagement()
							.getDependencies()) {
						if (ObjectUtils.nullSafeEquals(artifact.getArtifactId(),
								dependency.getArtifactId())
								&& ObjectUtils.nullSafeEquals(artifact.getGroupId(),
										dependency.getGroupId())) {
							dependency.setVersion(artifact.getVersion());
						}
					}
					if (isParentBom(model, artifact)) {
						model.getParent().setVersion(artifact.getVersion());
						replaced = true;
					}
					if (!replaced) {
						model.getDependencyManagement().addDependency(bom(artifact));
					}
				}
				else if (name.startsWith("dependencies.")) {
					String pom = properties.getProperty(name);
					DefaultArtifact artifact = artifact(pom);
					boolean replaced = false;
					for (Dependency dependency : model.getDependencies()) {
						if (ObjectUtils.nullSafeEquals(artifact.getArtifactId(),
								dependency.getArtifactId())
								&& ObjectUtils.nullSafeEquals(artifact.getGroupId(),
										dependency.getGroupId())
								&& artifact.getVersion() != null) {
							dependency.setVersion(
									StringUtils.hasLength(artifact.getVersion())
											? artifact.getVersion()
											: null);
							dependency.setScope("runtime");
							replaced = true;
						}
					}
					if (!replaced) {
						model.getDependencies().add(dependency(artifact));
					}
				}
				else if (name.startsWith("exclusions.")) {
					String pom = properties.getProperty(name);
					exclusions.add(pom);
				}
			}
			for (String pom : exclusions) {
				Exclusion exclusion = exclusion(pom);
				Dependency target = dependency(artifact(pom));
				Dependency excluded = null;
				for (Dependency dependency : model.getDependencies()) {
					dependency.addExclusion(exclusion);
					if (dependency.getGroupId().equals(target.getGroupId()) && dependency
							.getArtifactId().equals(target.getArtifactId())) {
						excluded = dependency;
					}
				}
				if (excluded != null) {
					model.getDependencies().remove(excluded);
				}
			}
		}
		return model;
	} 
                            #location 13 
                            #vulnerability type NULL_DEREFERENCE