CVE-2021-45686 — Use of Uninitialized Resource in csv-sniffer —...

CRITICAL

Use of Uninitialized Resource in csv-sniffer.

Published January 6, 2022Updated November 8, 2023Source: osv

Summary

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation (within fn preamble_skipcount()). Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

Advisory Timeline

First published January 6, 2022 (1740 days ago).
Last revised November 8, 2023 — 670 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo

Update csv-sniffer to 0.2.0 or later

cargo update -p csv-sniffer --precise 0.2.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

Package	Ecosystem	Affected	Fixed In
csv-sniffer	crates.io	All versions	0.2.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-908
View on MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2021-45686?: Use of Uninitialized Resource in csv-sniffer. This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2021-45686?: CVE-2021-45686 affects csv-sniffer. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-45686 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-9783-42pm-x5jq

GHSA-r67p-m7g9-gxw6

RUSTSEC-2021-0088

Related CVEs

RUSTSEC-2026-0327
CRITICAL
Wasmtime component async-lifted callback result count is unvalidated, causing a native stack buffer overflow
CVE-2026-75856
CRITICAL
CodeWhale: SSRF bypass - TOCTOU on DNS failure for DNS pinning

More crates.io advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies