TI-2024-14259 Aliases CVE-2024-21502 GHSA-ph86-g9r3-5qw4

Use of uninitialized resource in fastecdsa

MEDIUM 41CWE-457Published 2024-02-24 · Updated 2024-11-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-457 and the CVSS impact.

Summary

Versions of the package fastecdsa before 2.3.2 are vulnerable to Use of Uninitialized Variable on the stack, via the curvemath_mul function in src/curveMath.c, due to being used and interpreted as user-defined type. Depending on the variable's actual value it could be arbitrary free(), arbitrary realloc(), null pointer dereference and other. Since the stack can be controlled by the attacker, the vulnerability could be used to corrupt allocator structure, leading to possible heap exploitation. The attacker could cause denial of service by exploiting this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01025 63rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed fastecdsa: 2.3.2fastecdsa (PyPI): 2.3.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	fastecdsa	before 2.3.2	2.3.2	Patch available	CNA
—	fastecdsa (PyPI)	before 2.3.2	2.3.2	Patch available	GHSA-ph86-g9r3-5qw4

fastecdsa Vendor— Affected before 2.3.2 Fixed in 2.3.2 Patch available CNA
fastecdsa (PyPI) Vendor— Affected before 2.3.2 Fixed in 2.3.2 Patch available GHSA-ph86-g9r3-5qw4

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:antonkueltz:fastecdsa::::::::	before 2.3.2	Vulnerable	Antonkueltz

cpe:2.3:a:antonkueltz:fastecdsa:*:*:*:*:*:*:*:* Versions before 2.3.2 Vulnerable ·Antonkueltz

Remediation

Fix · CNA fastecdsa Fixed in 2.3.2
Fix · GHSA-ph86-g9r3-5qw4 fastecdsa (PyPI) Fixed in 2.3.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-21502
2026-10-03 Alias added: GHSA-ph86-g9r3-5qw4

References

Other 2

TI-2020-10031 An issue was discovered in fastecdsa before 2.1.2. CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences