Nettle
CVE-2021-3580
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAI
A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
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Technical ContextAI · show details
This vulnerability is classified under CWE-20. A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service. Affected products include: Nettle Project Nettle, Redhat Enterprise Linux, Debian Debian Linux, Netapp Ontap Select Deploy Administration Utility.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces inco
x86_64/ecc-384-modp.asm in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in
The ecc_256_modq function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces inco
The OCB feature in libnettle in Nettle 3.9 before 3.9.1 allows memory corruption. Rated critical severity (CVSS 9.8), th
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, ED
The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channe
A Bleichenbacher type side-channel based padding oracle attack was found in the way nettle handles endian conversion of
GitHub PoC
Exploit-DB