CVE-2023-2251 is a high-severity vulnerability that affects the yaml library from the yaml_project. This vulnerability allows an uncaught exception that could lead to service disruptions. With a CVSS score of 7.5, this vulnerability presents a significant risk to organizations that utilize this library in their software applications. The vulnerability can be exploited over a network, making it particularly concerning for web applications and services that rely on yaml for configuration management.
The urgency for organizations is high, as the availability impact is rated as significant. Attackers may leverage this vulnerability to cause service outages, which can disrupt operations and affect user experience. Organizations using versions of yaml prior to 2.0.0-5 should prioritize patching this vulnerability immediately to mitigate potential risks.
Currently, this vulnerability is not included in the Known Exploited Vulnerabilities (KEV) catalog, but it is essential to stay vigilant as the situation may evolve. The exploit database does not show any confirmed public exploits at this time, but the presence of PoCs on GitHub indicates that there may be potential for exploitation by skilled attackers.
Organizations using yaml should ensure they are on the latest version to avoid this vulnerability. The risk to organizations includes potential service outages and the need for emergency responses to mitigate disruptions.
Vulnerability Details
The vulnerability identified as CVE-2023-2251 allows for an uncaught exception in the yaml library prior to version 2.0.0-5. This bug can result in a significant availability impact. The CVSS score assigned to this vulnerability is 7.5, indicating a high severity level. The vulnerability is classified under CWE-248, which relates to uncaught exceptions in programming.
The affected product is the yaml library, specifically versions from 2.0.0-5 to below 2.2.2. The vulnerability was published on April 24, 2023, and has been modified since its initial disclosure.
Technical Analysis
The root cause of this vulnerability stems from a failure to properly handle exceptions within the yaml library's error handling routines. When the library encounters an unexpected state, it throws an uncaught exception, leading to application crashes or service interruptions.
The attack vector is classified as network-based, allowing attackers to exploit this vulnerability remotely without the need for physical access. The attack complexity is low, and no privileges or user interaction are required for successful exploitation. Consequently, any user or system relying on the library is at risk.
The impacts of this vulnerability specifically affect availability. Since the library is commonly used in many applications, the potential for widespread service disruptions is significant, particularly for web services that rely on yaml for configuration.
Risk & Impact Analysis
The risk to organizations includes potential outages and disruptions to services that depend on the yaml library. Given its widespread use in configuration and data serialization, the blast radius of this vulnerability is considerable, affecting any application or service that integrates yaml.
Organizations should evaluate their use of the yaml library and ensure they are running a patched version to eliminate this risk. With a CVSS score of 7.5 and a high exploitability rating, immediate action is warranted to secure systems against potential exploitation.
The EPSS score of 0.0048 indicates a low likelihood of exploitation in the wild, but organizations should not be complacent. As vulnerabilities are discovered and publicized, attackers can quickly adapt and exploit them, emphasizing the need for proactive measures.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions of the yaml library include all versions from 2.0.0-5 up to, but not including, 2.2.2. Organizations should verify their current version and upgrade to a patched release to mitigate this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching the yaml library to version 2.2.2 or higher. If a patch is not yet available, consider implementing configuration hardening measures such as disabling features that may trigger the vulnerability.
Monitoring for unusual application behavior and implementing network controls to limit exposure can also help reduce risks. For further support, organizations can engage in penetration testing to identify potential weaknesses.
Detection Guidance
To detect potential exploitation attempts related to CVE-2023-2251, organizations should monitor application logs for error messages related to yaml parsing failures. Additionally, unusual spikes in resource utilization or service crashes may indicate attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
The presence of this vulnerability in a widely used library emphasizes the need for regular security assessments and updates. Security teams should implement a robust vulnerability management program to ensure timely updates and patches are applied.
Organizations should also stay informed regarding emerging threats and vulnerabilities, particularly those related to the tools and libraries they utilize. Engaging in proactive security measures, such as adopting a penetration testing methodology, can provide insights into the security posture and help identify potential weaknesses.
In summary, the implications of CVE-2023-2251 serve as a reminder of the importance of maintaining security hygiene and ensuring software dependencies are kept up to date.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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