CVE-2022-25857 High Severity Vulnerability Detected In SnakeYAML 1.29.jar

by gitftunila 74 views
Iklan Headers

This article discusses the high-severity vulnerability CVE-2022-25857 detected in the snakeyaml-1.29.jar library. This vulnerability can lead to a Denial of Service (DoS) attack. We will delve into the details of the vulnerability, its impact, and the suggested fixes. This analysis is crucial for developers and security professionals using the SnakeYAML library in their projects, ensuring they can take the necessary steps to mitigate the risk and secure their applications.

Vulnerable Library: snakeyaml-1.29.jar

SnakeYAML is a YAML 1.1 parser and emitter for Java, widely used in various applications for handling YAML data. The specific library in question is snakeyaml-1.29.jar. The vulnerability resides in the way SnakeYAML handles nested collections, potentially allowing attackers to exploit the lack of depth limitation and cause a denial-of-service condition. Understanding the context of the vulnerability is the first step in addressing it effectively. This section will explore the library's function and its role in the broader application to provide a clear understanding of why this vulnerability is critical. The library's home page can be found at http://www.snakeyaml.org.

Dependency Details

  • Path to dependency file: /WebGoat8/pom.xml
  • Path to vulnerable library: /WebGoat8/pom.xml

This indicates that the vulnerable library is included as a dependency in the pom.xml file of the WebGoat8 project. The hierarchy of dependencies further clarifies how the vulnerable library is being used. The vulnerability occurs because snakeyaml-1.29.jar is a transitive dependency, meaning it's not directly included in the project but rather pulled in via another dependency. This is important to note, as developers might not be explicitly aware of snakeyaml-1.29.jar being part of their project. The dependency hierarchy is crucial for identifying the root cause and implementing the fix correctly. The following dependency hierarchy shows the path to the vulnerable library:

Dependency Hierarchy:

  • spring-boot-starter-validation-2.6.6.jar (Root Library)
    • spring-boot-starter-2.6.6.jar
      • :x: snakeyaml-1.29.jar (Vulnerable Library)

The vulnerable library is a transitive dependency of spring-boot-starter-2.6.6.jar, which is itself a dependency of spring-boot-starter-validation-2.6.6.jar. This means that upgrading spring-boot-starter-validation or spring-boot-starter might be necessary to resolve the vulnerability. Identifying the specific path through which the vulnerable library is included is crucial for determining the most effective remediation strategy. For example, simply upgrading SnakeYAML directly might not be possible if it's managed by the Spring Boot dependency management. This highlights the importance of understanding dependency management in Java projects and how vulnerabilities can be introduced through transitive dependencies.

Commit and Branch Information

This information indicates that the vulnerability was detected in the specified commit and the main branch of the repository. Knowing the specific commit and branch helps in pinpointing when and where the vulnerability was introduced. This can be valuable for auditing purposes and understanding the evolution of the vulnerability over time. The commit link provides direct access to the codebase at the time the vulnerability was present, allowing for a detailed analysis of the vulnerable code. The base branch information ensures that developers can focus their remediation efforts on the relevant branch, preventing the vulnerability from being deployed to production.

Vulnerability Details

The vulnerability, identified as CVE-2022-25857, affects versions of org.yaml:snakeyaml prior to 1.31. It is classified as a Denial of Service (DoS) vulnerability due to the missing nested depth limitation for collections. This means an attacker can craft a malicious YAML file with deeply nested collections, causing the parser to consume excessive resources and potentially crash the application. The implications of a DoS vulnerability can be severe, ranging from service unavailability to complete system failure. The complexity of exploiting this vulnerability is relatively low, making it a significant concern for applications using SnakeYAML. This vulnerability highlights the importance of input validation and resource management in software development. By understanding the specific nature of the vulnerability, developers can implement effective mitigation strategies and prevent attackers from exploiting this weakness.

Mend Note:

The Mend vulnerability database provides additional details about CVE-2022-25857, including its severity, affected versions, and potential impact. The publish date indicates when the vulnerability was publicly disclosed, allowing developers to stay informed and take timely action. The URL links to a comprehensive vulnerability report, providing detailed technical information and potential mitigation steps. Consulting vulnerability databases like Mend is crucial for staying up-to-date with the latest security threats and ensuring applications are protected against known vulnerabilities. These databases often offer valuable insights into the root cause of vulnerabilities, helping developers understand the underlying issues and implement robust security practices.

CVSS 3 Score Details (7.5)

The Common Vulnerability Scoring System (CVSS) provides a standardized way to assess the severity of vulnerabilities. CVE-2022-25857 has a CVSS 3 base score of 7.5, which is considered High severity. This score reflects the potential impact of the vulnerability and the ease with which it can be exploited. The score is derived from various metrics, including exploitability and impact metrics. Understanding these metrics helps in prioritizing remediation efforts and allocating resources effectively. A high CVSS score indicates that the vulnerability poses a significant risk to the application and should be addressed promptly.

Base Score Metrics:

Exploitability Metrics:

  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged

The exploitability metrics describe the ease with which the vulnerability can be exploited. An attack vector of