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.
- Score
- CVSS 3.1 6.5 Medium
- Status
- Modified - secalert@redhat.com
- Published
- 2022-08-24
- Last modified
- 2026-10-14
- Weaknesses
- CWE-476
Affected products
- Gnutls (Gnu)
- Active Iq Unified Manager (Netapp)
- Hci Bootstrap Os (Netapp)
- Solidfire & Hci Management Node (Netapp)
- Enterprise Linux (Redhat)
- Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
- Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
- Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
References
- https://gitlab.com/gnutls/gnutls/-/issues/1306
- https://bugzilla.redhat.com/show_bug.cgi?id=2044156
- https://access.redhat.com/security/cve/CVE-2021-4209
- https://gitlab.com/gnutls/gnutls/-/merge_requests/1503
- https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568
- https://security.netapp.com/advisory/ntap-20220915-0005/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
