CVE-2022-3509 is a high-severity vulnerability affecting the Google Protobuf library, specifically variants in protobuf-java and protobuf-javalite. This vulnerability allows for a denial of service (DoS) attack due to a parsing issue in textformat. The issue is present in versions prior to 3.21.7, 3.20.3, 3.19.6, and 3.16.3. Inputs with multiple instances of non-repeated embedded messages, accompanied by repeated or unknown fields, lead to objects being converted back and forth between mutable and immutable forms, which can result in significant garbage collection pauses.
The CVSS score for this vulnerability is 7.5, classified as high severity. The attack vector is network-based, with low complexity and no required privileges or user interaction. The impact on availability is particularly concerning, as it can disrupt service for organizations relying on this library.
Organizations should prioritize patching immediately to prevent potential service interruptions from this vulnerability. The affected versions include protobuf-java versions from 3.16.0 to less than 3.16.3, 3.19.0 to less than 3.19.6, 3.20.0 to less than 3.20.3, and 3.21.0 to less than 3.21.7. Similarly, protobuf-javalite versions in the same ranges are also affected.
Given the nature of the vulnerability, organizations using these libraries must ensure they are updated to the latest versions as soon as possible to mitigate the risk of exploitation.
Vulnerability Details
The vulnerability, CVE-2022-3509, is characterized by a parsing issue in the textformat of protobuf-java core and lite versions. The official description indicates that it can lead to denial of service attacks. The specifics of the vulnerability highlight that certain inputs can cause long garbage collection pauses, affecting the performance of applications utilizing these libraries. The CWE classification associated with this vulnerability is CWE-400, indicating the potential for resource exhaustion.
Technical Analysis
The root cause of CVE-2022-3509 lies in the way the Protobuf library handles parsing. Specifically, when multiple instances of non-repeated embedded messages are processed, the library experiences difficulties managing memory, switching objects between mutable and immutable states. This back-and-forth conversion creates inefficiencies in garbage collection, leading to potential delays and service disruptions.
The attack vector for this vulnerability is network-based, meaning that an attacker can exploit it remotely. The attack complexity is low; there are no privileges required, nor does the attack necessitate user interaction. The impacts on confidentiality and integrity are negligible, but the availability impact is rated as high, indicating significant risks for service downtime.
Risk & Impact Analysis
The real-world risk associated with CVE-2022-3509 is substantial, particularly for organizations that rely on the Protobuf library for critical applications. The potential for denial of service attacks means that these organizations could face significant operational disruptions, particularly if exploited during peak usage times. The urgency for remediation is high, given the CVSS score of 7.5, indicating a serious threat to availability.
Organizations should assess their current use of the vulnerable versions of Protobuf, and schedule remediation as soon as possible. The blast radius of this vulnerability extends beyond individual applications, potentially affecting entire services and user experiences.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of protobuf-java prior to 3.21.7, 3.20.3, 3.19.6, and 3.16.3 are affected. Additionally, protobuf-javalite versions prior to 3.21.7, 3.20.3, 3.19.6, and 3.16.3 are also vulnerable. Organizations should ensure they upgrade to the latest versions to mitigate risks.
Mitigation & Remediation
To remediate this vulnerability, organizations must update to the following versions: protobuf-java versions 3.21.7, 3.20.3, 3.19.6, or 3.16.3, and corresponding protobuf-javalite versions. If immediate patching is not possible, consider implementing application-level controls to restrict input types that can trigger this vulnerability. Monitoring for unusual garbage collection pauses in production environments can also help identify potential exploitation attempts.
Continuous security testing can also be beneficial to ensure the effectiveness of patches and to identify any residual vulnerabilities.
Detection Guidance
Organizations should monitor system logs for any anomalies or unusual behavior that may indicate attempts to exploit this vulnerability. Specific indicators include extended garbage collection times and abnormal application performance. Network signatures that correlate with the known behavior of denial of service attacks may also be useful for early detection.
AppSecure Threat Intelligence Insight
CVE-2022-3509 highlights the ongoing need for organizations to maintain an up-to-date understanding of their software components and the vulnerabilities that may affect them. The trend of software vulnerabilities impacting availability emphasizes the importance of robust incident response plans and proactive security measures.
Security teams should continually evaluate their vulnerability management practices and consider adopting strategies such as vulnerability management programs to enhance their ability to respond to emerging threats.
Additionally, leveraging resources like penetration testing methodologies can provide insights into potential weaknesses and improve overall security posture.
Finally, organizations should consider the benefits of engaging in red teaming exercises to stress test their defenses against sophisticated attacks.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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