CVE-2020-35879 in rulinalg Crate
Summary
by MITRE • 12/31/2020
An issue was discovered in the rulinalg crate through 2020-02-11 for Rust. There are incorrect lifetime-boundary definitions for RowMut::raw_slice and RowMut::raw_slice_mut.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/31/2020
The vulnerability exists within the rulinalg crate, a linear algebra library for rust programming language, specifically affecting versions released through February 11, 2020. This issue manifests in improper lifetime boundary definitions within the RowMut::raw_slice and RowMut::raw_slice_mut methods, creating potential memory safety concerns that could be exploited by malicious actors. The problem stems from incorrect lifetime annotations that fail to properly constrain the relationship between borrowed data and its underlying memory regions.
The technical flaw involves flawed lifetime parameter handling in the mutable row accessor methods of the linear algebra crate. When developers use RowMut::raw_slice or RowMut::raw_slice_mut functions, the incorrect lifetime boundaries can lead to situations where references to memory may outlive the actual data they point to, creating potential use-after-free conditions or memory corruption scenarios. This type of vulnerability falls under the broader category of memory safety issues that are particularly dangerous in systems programming languages like rust where memory management is critical for system integrity.
The operational impact of this vulnerability extends beyond simple code correctness issues into potential security implications for applications relying on the rulinalg crate for mathematical computations. When exploited, incorrect lifetime boundaries could allow attackers to manipulate memory layouts and potentially execute arbitrary code through carefully crafted inputs that exploit the improper reference semantics. Applications using this crate in scientific computing, machine learning frameworks, or any system requiring robust linear algebra operations may be exposed to these risks, particularly those handling sensitive data or operating in security-critical environments.
Mitigation strategies for this vulnerability require immediate version updates to patched releases of the rulinalg crate, as the underlying lifetime definitions must be corrected to properly constrain memory access patterns. Developers should also conduct thorough code reviews of any applications that utilize RowMut::raw_slice or RowMut::raw_slice_mut methods to identify potential exploitation vectors. Additionally, implementing comprehensive testing strategies including memory safety checks and formal verification techniques can help detect similar issues in other crates within the rust ecosystem. This vulnerability demonstrates the importance of careful lifetime management in systems programming and aligns with common attack patterns documented in the attack tree framework where improper resource handling leads to memory corruption exploits.
The flaw relates to CWE-467, which covers "Use of sizeof() on a Pointer Type" and CWE-121, which addresses "Stack-based Buffer Overflow", as improper lifetime management can lead to similar memory safety issues. From an ATT&CK perspective, this vulnerability could be leveraged in the execution phase of an attack lifecycle where adversaries attempt to manipulate memory structures through invalid pointer operations. The security implications are particularly concerning given that many rust applications rely on crates for mathematical operations and data processing, making this a potential vector for supply chain attacks targeting computational libraries used across multiple software systems.