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vuln-fix: Temporary File Information Disclosure
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This fixes temporary file information disclosure vulnerability due to the use
of the vulnerable `File.createTempFile()` method. The vulnerability is fixed by
using the `Files.createTempFile()` method which sets the correct posix permissions.

Weakness: CWE-377: Insecure Temporary File
Severity: Medium
CVSSS: 5.5
Detection: CodeQL & OpenRewrite (https://public.moderne.io/recipes/org.openrewrite.java.security.SecureTempFileCreation)

Reported-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>
Signed-off-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>

Bug-tracker: JLLeitschuh/security-research#18


Co-authored-by: Moderne <team@moderne.io>
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JLLeitschuh and TeamModerne committed Nov 18, 2022
1 parent f8f2633 commit 61abc10
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Showing 10 changed files with 45 additions and 35 deletions.
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Expand Up @@ -23,6 +23,7 @@
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.file.Files;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
Expand Down Expand Up @@ -121,7 +122,7 @@ public File download( String url, List<TransferListener> transferListeners, Mess
try
{
// create the landing file in /tmp for the downloaded source archive
downloaded = File.createTempFile( "download-", null );
downloaded = Files.createTempFile( "download-", null ).toFile();

// delete when the JVM exits, to avoid polluting the temp dir...
downloaded.deleteOnExit();
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Expand Up @@ -22,6 +22,7 @@
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.nio.file.Files;

import org.apache.maven.shared.utils.io.FileUtils;

Expand Down Expand Up @@ -66,7 +67,7 @@ protected void initFile()
// TODO: Log this in the debug log-level...
if ( unsafeGetFile() == null )
{
File tempFile = File.createTempFile( tempFilePrefix, tempFileSuffix );
File tempFile = Files.createTempFile( tempFilePrefix, tempFileSuffix ).toFile();

if ( tempFileDeleteOnExit )
{
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Expand Up @@ -29,6 +29,7 @@

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Collections;

import org.apache.commons.lang3.exception.ExceptionUtils;
Expand Down Expand Up @@ -108,7 +109,7 @@ public void testShouldFailToDownloadMalformedURL()
public void testShouldDownloadFromTempFileWithNoTransferListeners()
throws IOException, DownloadFailedException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupDefaultMockConfiguration();
Expand All @@ -125,7 +126,7 @@ public void testShouldDownloadFromTempFileWithNoTransferListeners()
public void testShouldDownloadFromTempFileTwiceAndUseCache()
throws IOException, DownloadFailedException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupDefaultMockConfiguration();
Expand All @@ -150,7 +151,7 @@ public void testShouldDownloadFromTempFileTwiceAndUseCache()
public void testShouldDownloadFromTempFileWithOneTransferListener()
throws IOException, DownloadFailedException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupDefaultMockConfiguration();
Expand All @@ -174,7 +175,7 @@ public void testShouldDownloadFromTempFileWithOneTransferListener()
public void testShouldFailToDownloadWhenWagonProtocolNotFound()
throws IOException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupMocksWithWagonManagerGetException( new UnsupportedProtocolException( "not supported" ) );
Expand All @@ -200,7 +201,7 @@ public void testShouldFailToDownloadWhenWagonProtocolNotFound()
public void testShouldFailToDownloadWhenWagonConnectThrowsConnectionException()
throws IOException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupMocksWithWagonConnectionException( new ConnectionException( "connect error" ) );
Expand All @@ -226,7 +227,7 @@ public void testShouldFailToDownloadWhenWagonConnectThrowsConnectionException()
public void testShouldFailToDownloadWhenWagonConnectThrowsAuthenticationException()
throws IOException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupMocksWithWagonConnectionException( new AuthenticationException( "bad credentials" ) );
Expand All @@ -252,7 +253,7 @@ public void testShouldFailToDownloadWhenWagonConnectThrowsAuthenticationExceptio
public void testShouldFailToDownloadWhenWagonGetThrowsTransferFailedException()
throws IOException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupMocksWithWagonGetException( new TransferFailedException( "bad transfer" ) );
Expand All @@ -278,7 +279,7 @@ public void testShouldFailToDownloadWhenWagonGetThrowsTransferFailedException()
public void testShouldFailToDownloadWhenWagonGetThrowsResourceDoesNotExistException()
throws IOException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupMocksWithWagonGetException( new ResourceDoesNotExistException( "bad resource" ) );
Expand All @@ -304,7 +305,7 @@ public void testShouldFailToDownloadWhenWagonGetThrowsResourceDoesNotExistExcept
public void testShouldFailToDownloadWhenWagonGetThrowsAuthorizationException()
throws IOException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupMocksWithWagonGetException( new AuthorizationException( "bad transfer" ) );
Expand All @@ -330,7 +331,7 @@ public void testShouldFailToDownloadWhenWagonGetThrowsAuthorizationException()
public void testShouldFailToDownloadWhenWagonDisconnectThrowsConnectionException()
throws IOException, DownloadFailedException
{
File tempFile = File.createTempFile( "download-source", "test" );
File tempFile = Files.createTempFile( "download-source", "test" ).toFile();
tempFile.deleteOnExit();

setupMocksWithWagonDisconnectException( new ConnectionException( "not connected" ) );
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Expand Up @@ -21,6 +21,7 @@

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;

import junit.framework.TestCase;

Expand All @@ -37,7 +38,7 @@ public class ArtifactLocationTest
public void testShouldConstructFromTempFileSpecification()
throws IOException
{
File f = File.createTempFile( "artifact-location.", ".test" );
File f = Files.createTempFile( "artifact-location.", ".test" ).toFile();
f.deleteOnExit();

Artifact a = new DefaultArtifact( "group", "artifact", VersionRange.createFromVersion( "1" ), null, "jar",
Expand All @@ -53,7 +54,7 @@ public void testShouldConstructFromTempFileSpecification()
public void testShouldRead()
throws IOException
{
File f = File.createTempFile( "url-location.", ".test" );
File f = Files.createTempFile( "url-location.", ".test" ).toFile();
f.deleteOnExit();

String testStr = "This is a test";
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Collections;

import junit.framework.TestCase;
Expand Down Expand Up @@ -106,7 +107,7 @@ public void testShouldFailToResolveSpecWithTwoTokens()
public void testShouldResolveSpecWithThreeTokensUsingDefaultType()
throws IOException
{
File tempFile = File.createTempFile( "artifact-location.", ".temp" );
File tempFile = Files.createTempFile( "artifact-location.", ".temp" ).toFile();
tempFile.deleteOnExit();

Artifact artifact = createMock( Artifact.class );
Expand Down Expand Up @@ -150,7 +151,7 @@ public void testShouldResolveSpecWithThreeTokensUsingDefaultType()
public void testShouldResolveSpecWithThreeTokensUsingCustomizedDefaultType()
throws IOException
{
File tempFile = File.createTempFile( "artifact-location.", ".temp" );
File tempFile = Files.createTempFile( "artifact-location.", ".temp" ).toFile();
tempFile.deleteOnExit();

Artifact artifact = createMock( Artifact.class );
Expand Down Expand Up @@ -194,7 +195,7 @@ public void testShouldResolveSpecWithThreeTokensUsingCustomizedDefaultType()
public void testShouldResolveSpecWithFourTokens()
throws IOException
{
File tempFile = File.createTempFile( "artifact-location.", ".temp" );
File tempFile = Files.createTempFile( "artifact-location.", ".temp" ).toFile();
tempFile.deleteOnExit();

Artifact artifact = createMock( Artifact.class );
Expand Down Expand Up @@ -238,7 +239,7 @@ public void testShouldResolveSpecWithFourTokens()
public void testShouldResolveSpecWithFiveTokens()
throws IOException
{
File tempFile = File.createTempFile( "artifact-location.", ".temp" );
File tempFile = Files.createTempFile( "artifact-location.", ".temp" ).toFile();
tempFile.deleteOnExit();

Artifact artifact = createMock( Artifact.class );
Expand Down Expand Up @@ -283,7 +284,7 @@ public void testShouldResolveSpecWithFiveTokens()
public void testShouldResolveSpecWithFiveTokensAndEmptyTypeToken()
throws IOException
{
File tempFile = File.createTempFile( "artifact-location.", ".temp" );
File tempFile = Files.createTempFile( "artifact-location.", ".temp" ).toFile();
tempFile.deleteOnExit();

Artifact artifact = createMock( Artifact.class );
Expand Down Expand Up @@ -328,7 +329,7 @@ public void testShouldResolveSpecWithFiveTokensAndEmptyTypeToken()
public void testShouldResolveSpecWithMoreThanFiveTokens()
throws IOException
{
File tempFile = File.createTempFile( "artifact-location.", ".temp" );
File tempFile = Files.createTempFile( "artifact-location.", ".temp" ).toFile();
tempFile.deleteOnExit();

Artifact artifact = createMock( Artifact.class );
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.file.Files;

import junit.framework.TestCase;

Expand All @@ -37,7 +38,7 @@ public class FileLocationTest

public void testShouldConstructWithFileThenRetrieveSameFile() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

FileLocation location = new FileLocation( file, file.getAbsolutePath() );
Expand All @@ -48,7 +49,7 @@ public void testShouldConstructWithFileThenRetrieveSameFile() throws IOException

public void testShouldReadFileContentsUsingByteBuffer() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

String testStr = "This is a test";
Expand All @@ -67,7 +68,7 @@ public void testShouldReadFileContentsUsingByteBuffer() throws IOException

public void testShouldReadFileContentsUsingStream() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

String testStr = "This is a test";
Expand All @@ -88,7 +89,7 @@ public void testShouldReadFileContentsUsingStream() throws IOException

public void testShouldReadFileContentsUsingByteArray() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

String testStr = "This is a test";
Expand All @@ -107,7 +108,7 @@ public void testShouldReadFileContentsUsingByteArray() throws IOException

public void testShouldReadThenClose() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

String testStr = "This is a test";
Expand All @@ -128,7 +129,7 @@ public void testShouldReadThenClose() throws IOException

public void testShouldOpenThenFailToSetFile() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

TestFileLocation location = new TestFileLocation( file.getAbsolutePath() );
Expand All @@ -148,7 +149,7 @@ public void testShouldOpenThenFailToSetFile() throws IOException

public void testShouldConstructWithoutFileThenSetFileThenOpen() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

TestFileLocation location = new TestFileLocation( file.getAbsolutePath() );
Expand All @@ -159,7 +160,7 @@ public void testShouldConstructWithoutFileThenSetFileThenOpen() throws IOExcepti

public void testShouldConstructWithLocationThenRetrieveEquivalentFile() throws IOException
{
File file = File.createTempFile( "test.", ".file-location" );
File file = Files.createTempFile( "test.", ".file-location" ).toFile();
file.deleteOnExit();

Location location = new TestFileLocation( file.getAbsolutePath() );
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;

import org.apache.maven.shared.io.logging.DefaultMessageHolder;
import org.apache.maven.shared.io.logging.MessageHolder;
Expand All @@ -33,7 +34,7 @@ public class FileLocatorStrategyTest

public void testShouldResolveExistingTempFileLocation() throws IOException
{
File f = File.createTempFile( "file-locator.", ".test" );
File f = Files.createTempFile( "file-locator.", ".test" ).toFile();
f.deleteOnExit();

FileLocatorStrategy fls = new FileLocatorStrategy();
Expand All @@ -51,7 +52,7 @@ public void testShouldResolveExistingTempFileLocation() throws IOException

public void testShouldFailToResolveNonExistentFileLocation() throws IOException
{
File f = File.createTempFile( "file-locator.", ".test" );
File f = Files.createTempFile( "file-locator.", ".test" ).toFile();
f.delete();

FileLocatorStrategy fls = new FileLocatorStrategy();
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.nio.file.Files;

import org.apache.commons.io.FileUtils;

Expand All @@ -33,7 +34,7 @@ public class URLLocationTest

public void testShouldConstructFromUrlAndTempFileSpecifications() throws IOException
{
File f = File.createTempFile( "url-location.", ".test" );
File f = Files.createTempFile( "url-location.", ".test" ).toFile();
f.deleteOnExit();

URL url = f.toURL();
Expand All @@ -43,7 +44,7 @@ public void testShouldConstructFromUrlAndTempFileSpecifications() throws IOExcep

public void testShouldTransferFromTempFile() throws IOException
{
File f = File.createTempFile( "url-location.", ".test" );
File f = Files.createTempFile( "url-location.", ".test" ).toFile();
f.deleteOnExit();

URL url = f.toURL();
Expand All @@ -56,7 +57,7 @@ public void testShouldTransferFromTempFile() throws IOException

public void testShouldTransferFromTempFileThenRead() throws IOException
{
File f = File.createTempFile( "url-location.", ".test" );
File f = Files.createTempFile( "url-location.", ".test" ).toFile();
f.deleteOnExit();

String testStr = "This is a test";
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;

import junit.framework.TestCase;

Expand Down Expand Up @@ -54,7 +55,7 @@ public void testShouldFailToResolveWithMalformedUrl()

public void testShouldResolveUrlForTempFile() throws IOException
{
File tempFile = File.createTempFile( "prefix.", ".suffix" );
File tempFile = Files.createTempFile( "prefix.", ".suffix" ).toFile();
tempFile.deleteOnExit();

String testStr = "This is a test.";
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.HashSet;
import java.util.Set;

Expand All @@ -41,7 +42,7 @@ public void testGetIncludedSources() throws IOException, InclusionScanException
File baseDir = new File("target" );
baseDir.deleteOnExit();
baseDir.mkdirs();
File f = File.createTempFile( "source1.", ".test", baseDir );
File f = Files.createTempFile( baseDir.toPath(), "source1.", ".test" ).toFile();

Set<String> sourceIncludes = new HashSet<>();
sourceIncludes.add( "**/*" + f.getName() );
Expand Down

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