Cyber Resilience

CVE-2023-30837

Vyperlang Vyper ≤ 0.3.8

Public PoC
Published
08 May 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS Score 0.0070 50th percentile
Risk Priority 58 floored blend · peak EPSS

Summary

CVE-2023-30837 is a high-severity Memory Allocation with Excessive Size Value (CWE-789) vulnerability in Vyperlang Vyper. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Endpoint Denial of Service (T1499); ranked at the 50th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability Data

Vyper is a pythonic smart contract language for the EVM. The storage allocator does not guard against allocation overflows in versions prior to 0.3.8. An attacker can overwrite the owner variable. This issue was fixed in version 0.3.8.

CWE(s)
CWE-789

Related Threats

MITRE ATT&CK Enterprise Techniques

T1499 Endpoint Denial of Service Impact
Adversaries may perform Endpoint Denial of Service (DoS) attacks to degrade or block the availability of services to users.
attack.mitre.org →
T1499.003 Application Exhaustion Flood Impact
Adversaries may target resource intensive features of applications to cause a denial of service (DoS), denying availability to those applications.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-24567Same product: Vyperlang Vyper
CVE-2023-42441Same product: Vyperlang Vyper
CVE-2024-32648Same product: Vyperlang Vyper
CVE-2023-37902Same product: Vyperlang Vyper
CVE-2023-39363Same product: Vyperlang Vyper
CVE-2024-24561Same product: Vyperlang Vyper
CVE-2025-21607Same product: Vyperlang Vyper
CVE-2024-32646Same product: Vyperlang Vyper
CVE-2023-42443Same product: Vyperlang Vyper
CVE-2024-24563Same product: Vyperlang Vyper

Affected Assets

vyperlang
vyper
≤ 0.3.8

Mitigating Controls

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 mostly match
prevents

Secure SDLC practices directly prevent coding flaws that trust unvalidated size values for allocations.

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.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect and block excessive allocation flaws before deployment.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes input validation and size checks that prevent unbounded allocations.

A.8.26 Application security requirements partial match
prevents

Application security requirements mandate bounds checking on size parameters to avoid excessive memory allocation.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles require resource-limit enforcement that mitigates uncontrolled memory requests.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly prohibit allocating memory from untrusted size values without validation.

A.8.6 Capacity management none match
none

Capacity management monitors overall resource use but does not prevent individual allocation bugs.

References