CVE-2024-21530

Published

02 October 2024

Modified

15 April 2026

CVSS Score v3.1 4.5

Click a component to see what it means

Raw vector

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

EPSS Score 0.0014 3th percentile

Risk Priority 34 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2024-21530 is a medium-severity Reusing a Nonce, Key Pair in Encryption (CWE-323) vulnerability in Rustsec (inferred from references). Its CVSS base score is 4.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked at the 3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2024-3124

Vulnerability Data

Versions of the package cocoon before 0.4.0 are vulnerable to Reusing a Nonce, Key Pair in Encryption when the encrypt, wrap, and dump functions are sequentially called. An attacker can generate the same ciphertext by creating a new encrypted message…

with the same cocoon object. **Note:** The issue does NOT affect objects created with Cocoon::new which utilizes ThreadRng.

CWE(s): CWE-323

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001 Data Obfuscation Command And Control

Adversaries may obfuscate command and control traffic to make it more difficult to detect.

attack.mitre.org →

T1003.001 LSASS Memory Credential Access

Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS).

attack.mitre.org →

T1003.004 LSA Secrets Credential Access

Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.

attack.mitre.org →

T1003.006 DCSync Credential Access

Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…

attack.mitre.org →

T1006 Direct Volume Access Stealth

Adversaries may directly access a volume to bypass file access controls and file system monitoring.

attack.mitre.org →

T1007 System Service Discovery Discovery

Adversaries may try to gather information about registered local system services.

attack.mitre.org →

Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-7003Shared CWE-323

CVE-2026-81341Shared CWE-323

CVE-2025-64767Shared CWE-323

CVE-2025-59870Shared CWE-323

CVE-2026-49952Shared CWE-323

CVE-2026-55967Shared CWE-323

CVE-2025-61739Shared CWE-323

CVE-2024-41951Shared CWE-323

CVE-2026-12205Shared CWE-323

CVE-2025-47345Shared CWE-323

Affected Assets

Rustsec

—

inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Control response

Prevent

Stop it (NIST 800-53)

—

Detect

Catch it (NIST detect / respond)

—

Harden

Shrink the surface (DISA STIG)

—

Validate

Prove the fix (OWASP ASVS)

V6.8.3
V11.3.4

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover nonce reuse through static analysis, fuzzing, or known-answer tests.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles include correct use of cryptographic primitives such as unique nonces per key.

SC-13 Cryptographic Protection partial match

Selecting and implementing appropriate cryptographic algorithms and modes reduces nonce-reuse exposure.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 partial match

blocks

Secure SDLC practices directly prevent nonce/key reuse errors in cryptographic implementations.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.19 Installation of software on operational systems partial match

removes

A.8.24 Use of cryptography partial match

blocks

Mandates proper cryptographic key and nonce management, directly preventing nonce/key-pair reuse.

A.8.26 Application security requirements partial match

removes

A.8.27 Secure system architecture and engineering principles partial match

removes

A.8.28 Secure coding partial match

prevents

Secure-coding rules can require unique nonces, but the control is broader than this single weakness.