CVE-2021-4209

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1

6.5 (MEDIUM) מקור הציון: NVD CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — סבירות ניצול

2% (אחוזון 100) נכון ל-14/10/2026

CWE

CWE-476

מוצרים מושפעים

gnu: gnutls; redhat: enterprise linux; netapp: active iq unified manager; netapp: solidfire \& hci management node; netapp: hci bootstrap os; netapp: hci compute node

קישורים

• https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da6130‮… PatchThird Party Advisory
• https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da6130‮… PatchThird Party Advisory
• https://access.redhat.com/security/cve/CVE-2021-4209 Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2044156 Issue TrackingThird Party Advisory
• https://gitlab.com/gnutls/gnutls/-/issues/1306 Third Party Advisory
• https://gitlab.com/gnutls/gnutls/-/merge_requests/1503 Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220915-0005/ Third Party Advisory
• https://access.redhat.com/security/cve/CVE-2021-4209 Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2044156 Issue TrackingThird Party Advisory
• https://gitlab.com/gnutls/gnutls/-/issues/1306 Third Party Advisory