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CVE-2021-4209

CVE-2021-4209

EPSS 1.4%CWE-476
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 1.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
24 Aug 2022Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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 · GnuTLS

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References
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/