Vulnerability Details CVE-2021-4209
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.017
EPSS Ranking 77.4%
CVSS Severity
CVSS v3 Score 6.5
References
- 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/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Products affected by CVE-2021-4209
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cpe:2.3:a:netapp:active_iq_unified_manager:-
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cpe:2.3:a:netapp:hci_bootstrap_os:-
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cpe:2.3:a:netapp:solidfire_&_hci_management_node:-
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cpe:2.3:h:netapp:hci_compute_node:-
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cpe:2.3:o:redhat:enterprise_linux:8.0