CVE-2021-26305 — Read of uninitialized memory in cdr — CVE Details

CRITICAL

Read of uninitialized memory in cdr

Published August 25, 2021Updated November 8, 2023Source: osv

Summary

An issue was discovered in Deserializer::read_vec in the cdr crate before 0.2.4 for Rust. A user-provided Read implementation can gain access to the old contents of newly allocated heap memory, violating soundness.

Advisory Timeline

First published August 25, 2021 (1874 days ago).
Last revised November 8, 2023 — 804 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo

Update cdr to 0.2.4 or later

cargo update -p cdr --precise 0.2.4

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
cdr	crates.io	All versions	0.2.4

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-2021-26305?: Read of uninitialized memory in cdr 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-2021-26305?: CVE-2021-26305 affects cdr. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-26305 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-37jj-wp7g-7wj4

RUSTSEC-2021-0012

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