Modernize and secure temp file creation #4
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Sensitive Information Disclosure
DescriptionSensitive Information Disclosure (also known as Sensitive Data Exposure) happens when an application does not adequately protect sensitive information that may wind up being disclosed to parties that are not supposed to have access to it. Sensitive data can include application-related information, such as session tokens, file names, stack traces, or confidential information, such as passwords, credit card data, sensitive health data, private communications, intellectual property, metadata, the product's source code, etc. Whichever security flaw is causing the information to be disclosed, all aspects of all kinds of services are potentially at risk. Sensitive Information Disclosure can arise in databases, operating systems, and network devices. It is particularly occurrent in web applications, as highlighted in OWASP's Top 10, which lists Sensitive Information Disclosure as part of the Insecure Design web application security risk of which to be aware. Necessary privacy and security protection legislation and regulations are created and reworked to try to ensure that organizations holding sensitive data meet their obligations to safeguard such data. The European General Data Protection Regulation (GDPR) is one such law; the Payment Card Industry Data Security Standard (PCI DSS) is an example of regulation. Read moreImpactThe scale of impact from a Sensitive Information Disclosure event is limited only by the type of sensitive information disclosed and a malicious actor's ability to leverage it. For example, the fallout could be as minor as a local pathname being disclosed in a stack trace, allowing a malicious actor to improve their knowledge of the target's implementation details, right through to a full-blown data leak involving millions of customers' confidential data. ScenariosOne typical example is to permit an end user to receive the default error pages of the application server. This can expose the location on the file system of the file that caused the issue along with the precise version of the server itself, and the third-party components. Attackers can use this knowledge in a variety of ways, for example, to target well-known exploits in one particular version of a component. A more severe scenario involves a web page rendering an error message from a SQL server for a failed query. If some parameter is in control of the attacker, a malicious actor could exploit this exposure to exfiltrate arbitrary data from the database by sending specially crafted queries. There are countless technologies sat under the IT umbrella susceptible to this comprehensive vulnerability class; basically, anything not properly tied down containing even minimal information may become the prey of a determined malicious actor. PreventionSensitive Information Disclosure is a symptom of poor security-control implementation in web applications. Preventing it requires developers to adhere to numerous, necessary industry best-practices in line with current regulations to increase the difficulty for the attacker.
TestingEnsure that data's confidentiality is protected from unauthorized observation or disclosure.
ReferencesOWASP - Top 10:2021 Insecure Design CWE - CWE-200: Exposure of Sensitive Information to an Unauthorized Actor |
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Micro-Learning Topic: Information disclosure (Detected by phrase)Matched on "information leakage"Many web applications and APIs do not properly protect sensitive data, such as financial, healthcare, and PII. Attackers may steal or modify such weakly protected data to conduct credit card fraud, identity theft, or other crimes. Sensitive data may be compromised without extra protection, such as encryption at rest or in transit, and requires special precautions when exchanged with the browser. Source: https://www.owasp.org/index.php/Category:OWASP_Top_Ten_Project Try a challenge in Secure Code Warrior |
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Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information |
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Review changes with SemanticDiff. Analyzed 1 of 1 files. Overall, the semantic diff is 33% smaller than the GitHub diff.
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View changes in DiffLens |
Potential issues, bugs, and flaws that can introduce unwanted behavior:
Code suggestions and improvements for better exception handling, logic, standardization, and consistency:
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PR Details of @pixeebot[bot] in junixsocket :
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NO JIRA
Micro-Learning Topic: Exposure of Sensitive Information to an Unauthorized Actor (CWE 200)Matched on "CWE-200"The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Try a challenge in Secure Code WarriorHelpful references
Micro-Learning Topic: Sensitive information exposure (Detected by phrase)Matched on "Sensitive Data Exposure"Displaying too much information without proper access-control can lead to sensitive data being revealed that could be of value to an attacker directly or useful in a subsequent attack. Try a challenge in Secure Code WarriorHelpful references
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The changes look good overall! 🚀 |
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| tempFile = Files.createTempFile(socketDir.toPath(), "jux", "-").toFile(); | ||
| } catch (IOException e) { | ||
| throw new RemoteException("Cannot create temporary file: " + e.getMessage(), e); |
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The temporary file created with Files.createTempFile is not deleted after use, which can lead to resource leakage and potentially fill up the filesystem with temporary files. Ensure that the temporary file is deleted after it is no longer needed, either by using a try-with-resources statement or by explicitly deleting the file in a finally block.
Please double check the following review of the pull request:Issues counts
Changes in the diff
Identified Issues
Issue 1: Use of hardcoded prefix and suffix in temp file creationExplanationThe current implementation uses hardcoded values "jux" and "-" for the prefix and suffix in the temp file creation. While this is not necessarily incorrect, it is generally better practice to make such values configurable or to use more descriptive names. Code to address the issueimport java.nio.file.Path;
import java.nio.file.Paths;
public static AFUNIXNaming getInstance(File socketDir, final int registryPort) {
// Other code...
File tempFile;
try {
String prefix = "jux";
String suffix = "-";
tempFile = Files.createTempFile(socketDir.toPath(), prefix, suffix).toFile();
} catch (IOException e) {
throw new RemoteException("Cannot create temporary file: " + e.getMessage(), e);
}
// Other code...
}Explanation of the fixThe fix involves extracting the hardcoded prefix and suffix into variables. This makes the code more flexible and easier to maintain. If needed, these variables can be made configurable through method parameters or configuration files. Missing TestsTo ensure the new method of creating temp files works as expected, add the following tests: import org.junit.jupiter.api.Test;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.rmi.RemoteException;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;
public class AFUNIXNamingTest {
@Test
public void testTempFileCreation() {
File socketDir = new File(System.getProperty("java.io.tmpdir"));
try {
AFUNIXNaming instance = AFUNIXNaming.getInstance(socketDir, 1099);
Path tempFilePath = Files.createTempFile(socketDir.toPath(), "jux", "-");
File tempFile = tempFilePath.toFile();
assertTrue(tempFile.exists(), "Temporary file should exist");
tempFile.deleteOnExit();
} catch (RemoteException | IOException e) {
fail("Exception should not be thrown: " + e.getMessage());
}
}
}This test ensures that the temporary file is created successfully and exists in the specified directory. Summon me to re-review when updated! Yours, Gooroo.dev |
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Hello @D0LLi. The PR is blocked on your approval. Please review it ASAP. |
4 similar comments
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Hello @D0LLi. The PR is blocked on your approval. Please review it ASAP. |
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Hello @D0LLi. The PR is blocked on your approval. Please review it ASAP. |
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Hello @D0LLi. The PR is blocked on your approval. Please review it ASAP. |
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Hello @D0LLi. The PR is blocked on your approval. Please review it ASAP. |
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I'm confident in this change, but I'm not a maintainer of this project. Do you see any reason not to merge it? If this change was not helpful, or you have suggestions for improvements, please let me know! |
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Just a friendly ping to remind you about this change. If there are concerns about it, we'd love to hear about them! |
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Hello @D0LLi. The PR is blocked on your approval. Please review it ASAP. |
1 similar comment
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Hello @D0LLi. The PR is blocked on your approval. Please review it ASAP. |
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This change may not be a priority right now, so I'll close it. If there was something I could have done better, please let me know! You can also customize me to make sure I'm working with you in the way you want. |
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This change replaces the usage of
java.io.File#createTempFilewithjava.nio.file.Files#createTempFilewhich has more secure attributes.The
java.io.File#createTempFile()method creates a file that is world-readable and world-writeable, which is almost never necessary. Also, the file created is placed in a predictable directory (e.g.,/tmp). Having predictable file names, locations, and will lead to many types of vulnerabilities. History has shown that this insecure pattern can lead to information leakage, privilege escalation and even code execution.Our changes look something like this:
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