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CVE-2021-27376 — Vulnerability in nb-connect — CVE Details

CRITICAL

nb-connect invalidly assumes the memory layout of std::net::SocketAddr

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

Summary

The nb-connect crate has assumed std::net::SocketAddrV4 and std::net::SocketAddrV6 have the same memory layout as the system C representation sockaddr. It has simply casted the pointers to convert the socket addresses to the system representation. The standard library does not say anything about the memory layout, and this will cause invalid memory access if the standard library changes the implementation. No warnings or errors will be emitted once the change happens.

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 nb-connect to 1.0.3 or later
cargo update -p nb-connect --precise 1.0.3

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

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
nb-connect
crates.io
All versions1.0.3

Vulnerability Classification

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

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-2021-27376?
nb-connect invalidly assumes the memory layout of std::net::SocketAddr 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-2021-27376?
CVE-2021-27376 affects nb-connect. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-27376 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-rm4w-6696-r77p
RUSTSEC-2021-0021

Related CVEs

More crates.io advisories

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