CVE-2024-21502

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    CVE-2024-21502

    Published: 24 Feb 2024Last Modified: 12 Aug 2026

    Summary:

    Details: 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.

    References: https://gist.github.com/keltecc/49da037072276f21b005a8337c15db26, https://github.com/AntonKueltz/fastecdsa/blob/v2.3.1/src/curveMath.c%23L210, https://security.snyk.io/vuln/SNYK-PYTHON-FASTECDSA-6262045, https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21502.json, https://nvd.nist.gov/vuln/detail/CVE-2024-21502, https://github.com/AntonKueltz/fastecdsa/commit/57fc5689c95d649dab7ef60cc99ac64589f01e36

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -80a106620bb02a4ab9a5cda99c245bac60dc425a

    Affected versions

    v2.3.1
    v2.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2024-21502 | CVE-DB