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CVE-2024-21502

7.5 · HIGH

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…

Published Feb 24, 2024CWE-457EPSS 1.03%

Overview

CVE-2024-21502 is a high-severity vulnerability. It was published on February 24, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgist.github.com/keltecc/49da037072276f21b005a8337c15db26GitHubgithub.com/AntonKueltz/fastecdsa/blob/v2.3.1/src/curveMath.c%23L210GitHubgithub.com/AntonKueltz/fastecdsa/commit/57fc5689c95d649dab7ef60cc99ac64589f01e36Refsecurity.snyk.io/vuln/SNYK-PYTHON-FASTECDSA-6262045GitHubgist.github.com/keltecc/49da037072276f21b005a8337c15db26GitHubgithub.com/AntonKueltz/fastecdsa/blob/v2.3.1/src/curveMath.c%23L210GitHubgithub.com/AntonKueltz/fastecdsa/commit/57fc5689c95d649dab7ef60cc99ac64589f01e36Refsecurity.snyk.io/vuln/SNYK-PYTHON-FASTECDSA-6262045

How CyberStrike helps

Frequently asked questions

What is CVE-2024-21502?

CVE-2024-21502 is a high-severity vulnerability. It was published on February 24, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-21502?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-21502?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-21502?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-21502 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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