CVE-2017-18040 in Bamboo
Summary
by MITRE
The viewDeploymentVersionCommits resource in Atlassian Bamboo before version 6.2.0 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the name of a release.
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Analysis
by VulDB Data Team • 01/01/2020
The vulnerability identified as CVE-2017-18040 represents a critical cross site scripting flaw within Atlassian Bamboo's viewDeploymentVersionCommits resource. This security weakness exists in versions prior to 6.2.0 and specifically affects the handling of release names where user input is not properly sanitized or validated. The vulnerability allows remote attackers to inject malicious HTML or JavaScript code through the release name field, creating a persistent XSS vector that can be exploited by unauthorized parties.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the deployment version commits viewing functionality. When users create or modify release names within the Bamboo deployment process, the system fails to adequately sanitize the input data before rendering it in the web interface. This oversight creates an opportunity for attackers to craft malicious payloads that execute within the context of other users' browsers who view the affected release information. The vulnerability operates at the application layer and requires no authentication to exploit, making it particularly dangerous in environments where multiple users interact with deployment information.
The operational impact of this XSS vulnerability extends beyond simple script execution, as it can lead to session hijacking, credential theft, and unauthorized access to deployment configurations. Attackers could potentially steal user sessions, modify deployment parameters, or gain access to sensitive information about the software development lifecycle. The vulnerability affects the core deployment functionality of Bamboo, which is critical for continuous integration and delivery processes, potentially compromising the integrity of the entire deployment pipeline. Organizations relying on Bamboo for their CI/CD workflows face significant risk if this vulnerability remains unpatched, as it could enable attackers to manipulate deployment versions and commit histories.
Mitigation strategies for CVE-2017-18040 primarily involve upgrading to Atlassian Bamboo version 6.2.0 or later, which includes proper input validation and output encoding mechanisms. Organizations should also implement additional security measures such as content security policies, regular security scanning of web applications, and input sanitization at multiple layers of the application stack. The vulnerability aligns with CWE-79 which specifically addresses cross site scripting flaws, and maps to ATT&CK technique T1566 related to spearphishing attachments and links. Security teams should conduct thorough testing of the patched version to ensure proper implementation of security controls and maintain monitoring for any potential exploitation attempts. Regular vulnerability assessments and security audits of the Bamboo deployment infrastructure are essential to prevent similar issues from emerging in other components of the system.