CVE-2021-4209

Description

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.

References

https://security.netapp.com/advisory/ntap-20220915-0005/

https://gitlab.com/gnutls/gnutls/-/merge_requests/1503

https://gitlab.com/gnutls/gnutls/-/issues/1306

https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568

https://bugzilla.redhat.com/show_bug.cgi?id=2044156

https://access.redhat.com/security/cve/CVE-2021-4209

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3