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.
Metrics
Affected Vendors & Products
Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-2760-1 | nettle security update |
Debian DSA |
DSA-4933-1 | nettle security update |
EUVD |
EUVD-2021-7730 | 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. |
Ubuntu USN |
USN-4906-1 | Nettle vulnerability |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 16 Jul 2025 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
epss
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epss
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-03T17:37:23.808Z
Reserved: 2020-12-17T00:00:00
Link: CVE-2021-20305
No data.
Status : Modified
Published: 2021-04-05T22:15:12.727
Modified: 2024-11-21T05:46:19.280
Link: CVE-2021-20305
OpenCVE Enrichment
No data.
Debian DLA
Debian DSA
EUVD
Ubuntu USN