A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.
The vulnerability is classified as low severity, with a CVSS score of 2.2, indicating a low impact on availability. However, the potential for a denial of service attack against specific background workers is a concern, particularly for environments relying on PostgreSQL in critical applications.
Risk to organizations includes disruption of services and potential downtime, especially in systems utilizing background workers for tasks like logical replication and autovacuum. Organizations should prioritize patching affected versions to prevent misuse of this vulnerability.
Given the nature of this vulnerability, it is crucial for organizations to assess their exposure and implement the necessary updates promptly. This will ensure that they remain resilient against potential denial of service attacks that exploit this flaw.
Vulnerability Details
CVE-2023-5870 is characterized by its impact on PostgreSQL's pg_cancel_backend role, which can affect background workers. It has been assigned a CVSS score of 2.2, indicating low severity primarily due to the specific conditions required for exploitation. The vulnerability affects multiple PostgreSQL and Red Hat products, specifically those versions prior to vendor patches.
The vulnerability was published on December 10, 2023, and holds a CWE classification of CWE-400 (Uncontrolled Resource Consumption).
Technical Analysis
The root cause of this vulnerability stems from the handling of background workers in PostgreSQL. Attackers may leverage the pg_cancel_backend function to signal background processes, potentially leading to service disruptions. The attack vector is through the network, requiring high privileges to execute the attack. The complexity of this attack is rated as high, indicating that it may require specific knowledge of the PostgreSQL environment and its extensions.
The attack does not require user interaction, which increases its risk factor. Availability impact is rated as low, but the potential for denial of service attacks on background workers should not be overlooked.
Risk & Impact Analysis
Organizations using PostgreSQL or Red Hat products that include PostgreSQL should assess the risk associated with CVE-2023-5870. The specific impact is primarily on services that rely on background workers, such as logical replication and autovacuum processes. The potential for a denial of service attack means that affected organizations could face service outages, which can disrupt operations and affect business continuity.
Given the CVSS score of 2.2, organizations may classify this vulnerability as low priority; however, the nature of the vulnerability necessitates timely remediation to mitigate the risk. Organizations should monitor for any signs of exploitation and apply patches as soon as they are available.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions of PostgreSQL and associated Red Hat products are affected by this vulnerability:
PostgreSQL versions from 11.0 to 11.21, 12.0 to 12.16, 13.0 to 13.12, 14.0 to 14.9, and 15.0 to 15.4, as well as the specific version 16.0.
Mitigation & Remediation
Organizations are advised to patch affected versions of PostgreSQL and associated Red Hat products as soon as updates are released. Upgrading to the latest version will mitigate the risks associated with this vulnerability. If immediate patching is not possible, consider implementing configuration changes to limit access to the pg_cancel_backend role.
For continuous monitoring and assessment of vulnerabilities, organizations should engage in continuous penetration testing and implement security measures to strengthen their defenses against potential exploits.
Detection Guidance
To detect possible exploitation of this vulnerability, organizations should monitor logs for unusual signals related to background workers. Additionally, they should look for any signs of denial of service attacks and assess the behavior of background worker processes.
AppSecure Threat Intelligence Insight
CVE-2023-5870 represents a significant concern for organizations utilizing PostgreSQL in environments where background workers are critical. The nature of this vulnerability highlights the importance of regular security assessments and patch management.
Organizations should consider reviewing their vulnerability management programs and ensuring that they are aligned with industry best practices to minimize exposure to such vulnerabilities.
Furthermore, the lessons learned from this vulnerability can inform future security strategies, emphasizing the need for proactive measures and ongoing training for security teams.
To further enhance security posture, organizations should invest in red teaming services to identify weaknesses in their systems and improve overall resilience.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)