CVE-2025-47736 in libsql-sqlite3-parser
Summary
by MITRE • 05/09/2025
dialect/mod.rs in the libsql-sqlite3-parser crate through 0.13.0 before 14f422a for Rust can crash if the input is not valid UTF-8.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 05/09/2025
The vulnerability identified as CVE-2025-47736 affects the libsql-sqlite3-parser crate version 0.13.0 and earlier, specifically within the dialect/mod.rs file. This issue represents a crash condition that occurs when processing input data that does not conform to valid UTF-8 encoding standards. The flaw exists in the parsing logic that handles SQL statement interpretation and can lead to abrupt program termination when encountering malformed input sequences. The vulnerability demonstrates characteristics consistent with improper input validation and error handling within parsing libraries, where the system fails to gracefully manage unexpected data formats.
The technical implementation of this vulnerability stems from the crate's failure to properly validate UTF-8 encoding before processing input strings. When the parser encounters non-UTF-8 data, it likely attempts to perform operations on invalid byte sequences without proper error boundaries or recovery mechanisms. This behavior aligns with CWE-129, which addresses improper validation of array indices, and CWE-704, concerning incorrect type conversion. The parsing routine in dialect/mod.rs appears to assume all input data is valid UTF-8, leading to memory access violations or assertion failures when invalid sequences are processed. The specific commit reference 14f422a indicates a fix was implemented to address this issue, suggesting the developers recognized the need for robust input validation.
The operational impact of this vulnerability extends beyond simple program crashes, potentially affecting systems that rely on this parser for SQL statement processing. Applications using this crate may experience denial of service conditions when processing untrusted input, particularly in web applications or database interfaces that accept user-provided SQL queries. Attackers could exploit this vulnerability by crafting malicious input sequences designed to trigger the crash, potentially causing service disruption or system instability. The vulnerability falls under the ATT&CK technique T1499.004, which covers network denial of service attacks, and T1211, involving exploitation of input validation flaws. Systems that process SQL statements from external sources become particularly vulnerable, as they may not adequately sanitize input before passing it to the affected parser component.
Mitigation strategies for this vulnerability should focus on immediate patching to the affected crate version, ensuring that all applications using libsql-sqlite3-parser update to version containing commit 14f422a or later. Organizations should implement input validation at multiple layers, including application-level sanitization before data reaches the parser, and consider implementing robust error handling that can gracefully manage malformed input. Additionally, monitoring systems should be configured to detect unusual crash patterns or service disruptions that might indicate exploitation attempts. The fix implemented in the subsequent version demonstrates proper error handling for UTF-8 validation, which should be validated through regression testing to ensure that similar issues do not arise in other components of the parsing system. Security teams should also consider implementing automated testing that includes invalid UTF-8 sequences to prevent similar vulnerabilities from being introduced in future development cycles.