CVE-2021-20305
High
Description
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.
SeverityHigh
CVSS8.1
Exploit probability—
Product
Nettle
PublishedApr 5, 2021
First seenApr 5, 2021
Weakness typeCWE-327CWE-327
How to fix
Update
- nettle_project nettle3.7.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nettle_project nettle | v < 3.7.2 | 3.7.2 |
| fedoraproject fedora | 33 | — |
| redhat enterprise_linux | 7.0, 8.0 | — |
| netapp active_iq_unified_manager | No range specified | — |
| netapp ontap_select_deploy_administration_utility | No range specified | — |
| debian debian_linux | 9.0, 10.0 | — |
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