CVE-2021-4209
Estado: ModificadaMedia (6.5)—
A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 6.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.75%
- Percentil entre todas las CVEs puntuadas: 77
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (5)
CWE
- CWE-476
- CWE-476
Referencias
- https://access.redhat.com/security/cve/CVE-2021-4209
- https://bugzilla.redhat.com/show_bug.cgi?id=2044156
- https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568
- https://gitlab.com/gnutls/gnutls/-/issues/1306
- https://gitlab.com/gnutls/gnutls/-/merge_requests/1503
- https://security.netapp.com/advisory/ntap-20220915-0005/
- https://access.redhat.com/security/cve/CVE-2021-4209
- https://bugzilla.redhat.com/show_bug.cgi?id=2044156
- https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568
- https://gitlab.com/gnutls/gnutls/-/issues/1306
- https://gitlab.com/gnutls/gnutls/-/merge_requests/1503
- https://security.netapp.com/advisory/ntap-20220915-0005/
JSON original (NVD)
Mostrar
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