CVE-2021-45682 in bronzedb-protocol Crate
Summary
by MITRE • 12/27/2021
An issue was discovered in the bronzedb-protocol crate through 2021-01-03 for Rust. ReadKVExt may read from uninitialized memory locations.
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Analysis
by VulDB Data Team • 12/30/2021
The vulnerability identified as CVE-2021-45682 affects the bronzedb-protocol crate version 2021-01-03 and earlier, representing a critical memory safety issue within Rust-based applications that utilize this crate for database protocol handling. This vulnerability resides in the ReadKVExt functionality which is designed to read key-value pairs from database protocols but suffers from improper memory initialization handling. The flaw manifests when the crate attempts to process data structures that contain uninitialized memory segments, creating potential security risks for applications relying on this protocol implementation.
The technical root cause of this vulnerability stems from improper memory management practices within the ReadKVExt implementation, specifically failing to initialize memory locations before reading from them. This issue directly maps to CWE-456 which categorizes uninitialized variables and memory access patterns that can lead to information disclosure or arbitrary code execution. The vulnerability occurs when the crate processes database protocol data without ensuring that memory regions are properly initialized, potentially exposing sensitive information from adjacent memory locations or creating conditions that could be exploited by malicious actors.
From an operational impact perspective, this vulnerability poses significant risks to systems utilizing the bronzedb-protocol crate for database communications. Applications that process database queries or handle protocol data through this crate could experience information leakage where uninitialized memory contents are inadvertently exposed to callers. The vulnerability could potentially enable attackers to extract sensitive data from memory, including cryptographic keys, user credentials, or other confidential information depending on the application context. Additionally, the uninitialized memory access could lead to application instability or crashes, creating denial of service conditions that would impact system availability.
The security implications extend beyond simple information disclosure to potentially enabling more sophisticated attacks within the context of the broader ATT&CK framework. The vulnerability could be leveraged as part of initial access or privilege escalation techniques, particularly when combined with other memory corruption vulnerabilities. Attackers might exploit this issue to gain insights into memory layout or application state, which could then be used to craft more targeted attacks against the system. The vulnerability also aligns with ATT&CK technique T1059 which involves executing malicious code through legitimate system processes, as the uninitialized memory access could provide opportunities for code injection or manipulation of application behavior.
Mitigation strategies for this vulnerability should prioritize immediate updates to the bronzedb-protocol crate to versions that address the uninitialized memory access issue. Organizations should implement comprehensive code review processes to identify similar patterns in other third-party dependencies and internal codebases that might exhibit similar memory initialization problems. Memory safety testing should be integrated into the development lifecycle including fuzzing and static analysis tools specifically designed to detect uninitialized memory access patterns. Additionally, defensive programming practices such as explicit memory initialization, bounds checking, and regular security audits of all database protocol handling components should be implemented to prevent similar vulnerabilities from emerging in future releases.