CVE-2019-15010 in Server
Summary
by MITRE
Bitbucket Server and Bitbucket Data Center versions starting from version 3.0.0 before version 5.16.11, from version 6.0.0 before 6.0.11, from version 6.1.0 before 6.1.9, from version 6.2.0 before 6.2.7, from version 6.3.0 before 6.3.6, from version 6.4.0 before 6.4.4, from version 6.5.0 before 6.5.3, from version 6.6.0 before 6.6.3, from version 6.7.0 before 6.7.3, from version 6.8.0 before 6.8.2, and from version 6.9.0 before 6.9.1 had a Remote Code Execution vulnerability via certain user input fields. A remote attacker with user level permissions can exploit this vulnerability to run arbitrary commands on the victim's systems. Using a specially crafted payload as user input, the attacker can execute arbitrary commands on the victim's Bitbucket Server or Bitbucket Data Center instance.
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Analysis
by VulDB Data Team • 03/24/2024
This remote code execution vulnerability in Bitbucket Server and Bitbucket Data Center represents a critical security flaw that allows authenticated attackers with user-level permissions to execute arbitrary commands on affected systems. The vulnerability affects multiple version ranges across different major releases, indicating a persistent issue in the input validation mechanisms of the platform. The flaw manifests through specific user input fields that do not properly sanitize or validate incoming data, creating an attack surface where malicious payloads can be injected and subsequently executed with the privileges of the Bitbucket service account.
The technical nature of this vulnerability aligns with common web application security issues that fall under CWE-74, which describes "Improper Neutralization of Special Elements in Output Used by a Downstream Component." The vulnerability enables attackers to craft specially formatted payloads that bypass normal input validation controls, allowing command injection attacks to succeed. This type of vulnerability is particularly dangerous in enterprise environments where Bitbucket servers often run with elevated privileges and may have access to sensitive repositories, build systems, and integration services. The attack vector operates through user-facing input fields, making it accessible to any authenticated user who can submit data to the system, which typically includes developers, administrators, and other authorized personnel.
The operational impact of this vulnerability extends beyond simple command execution, as it can enable attackers to compromise entire development environments and access sensitive code repositories. Attackers could potentially exfiltrate source code, manipulate build processes, or establish persistent access through the compromised Bitbucket instance. This vulnerability directly maps to ATT&CK technique T1059, "Command and Scripting Interpreter," where adversaries use legitimate system utilities to execute commands. The risk is amplified in continuous integration environments where Bitbucket may be integrated with automated build systems, deployment pipelines, and other infrastructure components that could be leveraged for further lateral movement or data exfiltration.
Organizations should implement immediate mitigations including applying the vendor-provided security patches for all affected versions, implementing network segmentation to limit access to Bitbucket servers, and conducting thorough security assessments of existing user permissions and access controls. Additional protective measures should include monitoring for unusual command execution patterns, implementing web application firewalls to detect and block malicious payloads, and establishing comprehensive logging and alerting mechanisms. The vulnerability demonstrates the importance of proper input validation and output encoding in web applications, as well as the necessity of regular security updates and vulnerability assessments to maintain secure development environments.