CVE-2021-4209
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 1.7%
exploitation probability
1.7%top 23% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
n/a · GnuTLSReferences
https://access.redhat.com/security/cve/CVE-2021-4209https://bugzilla.redhat.com/show_bug.cgi?id=2044156https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568https://gitlab.com/gnutls/gnutls/-/issues/1306https://gitlab.com/gnutls/gnutls/-/merge_requests/1503https://security.netapp.com/advisory/ntap-20220915-0005/