CVE-2021-41232 in Thunderdome
Summary
by MITRE • 11/02/2021
Thunderdome is an open source agile planning poker tool in the theme of Battling for points. In affected versions there is an LDAP injection vulnerability which affects instances with LDAP authentication enabled. The provided username is not properly escaped. This issue has been patched in version 1.16.3. If users are unable to update they should disable the LDAP feature if in use.
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Analysis
by VulDB Data Team • 11/06/2021
The vulnerability identified as CVE-2021-41232 affects Thunderdome, an open source agile planning poker tool designed for team collaboration in point-based gaming scenarios. This application provides a platform for distributed teams to engage in competitive planning sessions where participants battle for points through collaborative decision making. The tool's architecture includes LDAP authentication capabilities that allow integration with enterprise directory services, enabling single sign-on functionality for organizational users. The vulnerability specifically targets instances where LDAP authentication has been enabled, creating a potential attack vector that could compromise the authentication mechanism and underlying directory service integration.
The technical flaw manifests as an LDAP injection vulnerability stemming from improper input sanitization of user-provided credentials. When users attempt to authenticate through the LDAP-enabled interface, the application fails to properly escape or sanitize the username parameter before incorporating it into LDAP query constructions. This lack of input validation creates an environment where maliciously crafted usernames can manipulate the LDAP query structure, potentially allowing attackers to bypass authentication mechanisms, enumerate valid user accounts, or access unauthorized directory information. The vulnerability directly corresponds to CWE-91, which identifies improper neutralization of special elements used in an LDAP search filter, and represents a classic injection flaw that can be exploited to manipulate backend directory services.
The operational impact of this vulnerability extends beyond simple authentication bypass scenarios, as it can enable attackers to perform reconnaissance activities against the underlying LDAP directory service. An attacker could potentially extract information about valid usernames, group memberships, or other directory attributes that are typically protected by proper authentication controls. This information disclosure could facilitate further attacks against the organization's infrastructure, including password spraying attacks against valid accounts or exploitation of other vulnerabilities within the directory service. The vulnerability particularly affects organizations that rely on LDAP integration for user management, as it undermines the security controls that should protect access to enterprise directory services through the Thunderdome application.
Organizations utilizing Thunderdome with LDAP authentication enabled should immediately implement remediation measures to address this vulnerability. The primary solution involves upgrading to version 1.16.3 or later, which includes proper input sanitization and escaping mechanisms for LDAP queries. For environments where immediate upgrades are not feasible, administrators should disable the LDAP authentication feature entirely if it is not actively required for operations. This mitigation strategy aligns with the principle of least privilege and reduces the attack surface by eliminating the vulnerable authentication pathway. Security teams should also monitor for any unusual authentication attempts or directory access patterns that might indicate exploitation attempts, while considering additional controls such as network segmentation or access logging to detect potential abuse of the vulnerable functionality. The vulnerability demonstrates the critical importance of proper input validation and sanitization in applications that interface with backend services, particularly those involving directory authentication mechanisms that are fundamental to enterprise security infrastructure.