Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Gnutls | < 3.7.3 |
| Redhat | Enterprise Linux | 8.0 |
| Netapp | Active Iq Unified Manager | - |
| Netapp | Solidfire \& Hci Management Node | - |
| Netapp | Hci Bootstrap Os | - |
| Netapp | Hci Compute Node | - |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2021-4209Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2044156Issue TrackingThird Party Advisory
- https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da613005PatchThird Party Advisory
- https://gitlab.com/gnutls/gnutls/-/issues/1306Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/merge_requests/1503Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220915-0005/Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-4209Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2044156Issue TrackingThird Party Advisory
- https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da613005PatchThird Party Advisory
- https://gitlab.com/gnutls/gnutls/-/issues/1306Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/merge_requests/1503Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220915-0005/Third Party Advisory
FAQ
What is CVE-2021-4209?
CVE-2021-4209 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ...
How severe is CVE-2021-4209?
CVE-2021-4209 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4209?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Gnutls, Redhat Enterprise Linux, Netapp Active Iq Unified Manager, Netapp Solidfire \& Hci Management Node, Netapp Hci Bootstrap Os.