CVE-2023-6839 : Exploit Details and Defense Strategies

This CVE-2023-6839 was assigned by WSO2 and published on December 15, 2023. It affects WSO2 API Manager versions less than 3.0.0.0, 3.0.0.15, and 3.2.0.32 due to improper error handling in a REST API resource.

Understanding CVE-2023-6839

This vulnerability in WSO2 API Manager exposes a server-side error containing an internal WSO2 specific package name in the HTTP response, leading to the potential retrieval of embedded sensitive data as per CAPEC-37.

What is CVE-2023-6839?

The vulnerability (CVE-2023-6839) in WSO2 API Manager arises from improper error handling in a REST API resource, which can result in exposing server-side errors containing internal package names. This exposure could potentially be exploited to retrieve embedded sensitive data.

The Impact of CVE-2023-6839

The impact of CVE-2023-6839, based on the CVSS v3.1 metrics, is rated as a medium severity with a base score of 5.3. The confidentiality impact is low, with no integrity impact and no availability impact. Attack vector is over the network with low attack complexity.

Technical Details of CVE-2023-6839

This section provides more technical insights into the vulnerability, including its description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability (CVE-2023-6839) in WSO2 API Manager is due to improper error handling in a REST API resource, which exposes server-side errors containing an internal WSO2 specific package name.

Affected Systems and Versions

WSO2 API Manager versions less than 3.0.0.0, 3.0.0.15, and 3.2.0.32 are affected by CVE-2023-6839. Users of these versions may be at risk of sensitive data exposure through server-side errors.

Exploitation Mechanism

Exploiting CVE-2023-6839 involves triggering the improper error handling in the REST API resource, causing it to expose internal package names in the HTTP response. This exposure may allow threat actors to retrieve sensitive data embedded in the responses.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-6839, prompt actions need to be taken to address the vulnerability and prevent any potential exploitation.

Immediate Steps to Take

WSO2 Subscription holders are advised to apply the provided patch/update to the affected versions of WSO2 API Manager. It is essential to follow any instructions accompanying the patch/update diligently. Community users may also apply relevant fixes based on the public information provided.

Long-Term Security Practices

Incorporating robust error handling mechanisms and regularly updating systems can enhance security posture and prevent similar vulnerabilities from being exploited in the future.

Patching and Updates

Applying patches and updates from WSO2 for the affected versions of API Manager is crucial to eliminate the vulnerability and strengthen the security of the system.

By addressing CVE-2023-6839 promptly and adopting proactive security measures, organizations can safeguard their systems and sensitive data from potential exploitation.