CVE-2021-4209
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Gnutls
PublishedAug 24, 2022
First seenAug 24, 2022
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- gnu gnutls3.7.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu gnutls | v < 3.7.3 | 3.7.3 |
| redhat enterprise_linux | 8.0 | — |
| netapp active_iq_unified_manager | No range specified | — |
| netapp solidfire_\&_hci_management_node | No range specified | — |
| netapp hci_bootstrap_os | No range specified | — |
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