CVE-2024-5082 Scanner

Nexus Repository 2 is a widely used artifact repository manager that facilitates the storage and distribution of software components. It is primarily used by development teams to manage dependencies, store binary artifacts, and integrate with CI/CD pipelines. The platform supports various repository formats, including Maven, NuGet, and Docker. Organizations rely on Nexus Repository to securely host and manage internal software libraries. Due to its extensive use in software development, security vulnerabilities in Nexus Repository can have significant impacts on the software supply chain. The security of stored artifacts is crucial for maintaining the integrity of software development processes.

The Remote Code Execution (RCE) vulnerability in Nexus Repository 2 up to version 2.15.1 allows attackers to execute arbitrary commands on the server. The vulnerability exists due to improper input handling when processing repository requests. Attackers can exploit this flaw by sending specially crafted payloads that trigger command execution. This issue poses a serious risk, as it enables unauthorized access and control over the affected server. If exploited, attackers can manipulate stored artifacts, modify repository content, or gain deeper access to the infrastructure. Organizations using affected versions should apply security updates immediately.

The vulnerability arises from the way Nexus Repository 2 processes user-supplied input in repository requests. Specifically, an attacker can craft a request to manipulate the repository metadata processing functionality, injecting malicious payloads. The attack involves sending crafted PUT requests to upload manipulated metadata files that contain embedded commands. Once processed, these commands execute on the server, granting the attacker remote control. The vulnerability is particularly severe because it allows execution of system commands without authentication in certain configurations. Exploiting this flaw can lead to a full system compromise.

Successful exploitation of this vulnerability allows attackers to execute arbitrary code on the affected server. This can lead to unauthorized access, privilege escalation, data manipulation, and potential backdoor installation. Attackers may use the compromised server to distribute malicious software, tamper with stored artifacts, or pivot to other systems in the network. Organizations relying on Nexus Repository for software supply chain security must mitigate this risk immediately. The severity of this vulnerability makes it critical for affected users to implement fixes as soon as possible.

REFERENCES

• https://github.blog/security/vulnerability-research/attacks-on-maven-proxy-repositories/
• https://support.sonatype.com/hc/en-us/articles/30694125380755