CVE-2024-34883 in Bitrix24
Summary
by MITRE • 11/04/2024
Insufficiently protected credentials in DAV server settings in 1C-Bitrix Bitrix24 23.300.100 allow remote administrators to read proxy-server accounts passwords via HTTP GET request.
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Analysis
by VulDB Data Team • 11/04/2024
The vulnerability identified as CVE-2024-34883 represents a critical security flaw in the 1C-Bitrix Bitrix24 platform version 23.300.100, specifically within the Distributed Authoring and Versioning (DAV) server configuration settings. This issue stems from inadequate protection mechanisms for sensitive authentication credentials stored within the system's proxy server account configurations. The flaw manifests when remote administrators can exploit HTTP GET requests to retrieve proxy server account passwords without proper authorization, creating a significant vector for unauthorized access and potential system compromise. The vulnerability directly impacts the platform's security posture by exposing authentication credentials that should remain protected within the system's internal configuration structures.
The technical implementation of this vulnerability involves the DAV server's insufficient input validation and access control mechanisms when processing HTTP GET requests. When administrators configure proxy server settings within Bitrix24, the system stores authentication credentials in a manner that fails to adequately protect them from unauthorized retrieval through standard web requests. The flaw occurs because the DAV server component does not properly validate request origins or implement adequate authentication checks before exposing proxy account credentials. This represents a failure in the principle of least privilege and proper credential handling, where sensitive information flows through the system without appropriate security controls. The vulnerability aligns with CWE-522, which addresses insufficiently protected credentials, and demonstrates weak access control mechanisms in web server configurations.
The operational impact of CVE-2024-34883 extends beyond simple credential exposure, as it enables attackers to potentially escalate privileges and gain unauthorized access to network resources. Remote attackers can leverage this vulnerability to obtain proxy server credentials and subsequently access external systems that require authentication through these proxy accounts. This creates a chain of potential compromise where initial access to the Bitrix24 platform can lead to broader network infiltration, particularly in environments where proxy servers serve as gateways to internal systems. The vulnerability affects organizations that rely on Bitrix24 for business process automation and collaboration, potentially exposing sensitive corporate data and disrupting business operations. From an attack perspective, this vulnerability maps to ATT&CK technique T1566.001 for credential access through social engineering and T1071.004 for application layer protocols, as it exploits HTTP-based communication channels.
Organizations should implement immediate mitigations including patching the affected Bitrix24 version to the latest security release, implementing network segmentation to limit access to DAV server components, and conducting thorough credential audits to identify any potential compromise. Additional protective measures involve configuring proper access controls on DAV server endpoints, implementing web application firewalls to monitor and filter HTTP GET requests, and establishing monitoring procedures to detect unauthorized credential access attempts. Security teams should also review proxy server configurations and ensure that authentication credentials are properly encrypted and stored with appropriate access controls. The vulnerability underscores the importance of proper input validation and access control implementation in web applications, particularly those handling sensitive authentication information. Organizations must also consider implementing zero-trust network principles and regular security assessments to identify similar configuration flaws that could expose sensitive credentials through various communication protocols.