Nettle 3.1 ecc-256.c ecc_256_modp 7pk security

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability was found in Nettle 3.1. It has been rated as very critical. This issue affects the function ecc_256_modp of the file ecc-256.c. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality, integrity, and availability.

The weakness was released 02/23/2016 (Website). It is possible to read the advisory at The identification of this vulnerability is CVE-2015-8803 since 02/01/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/08/2022). The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 88771 (openSUSE Security Update : libnettle (openSUSE-2016-211)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157291 (Oracle Enterprise Linux Security Update for nettle (ELSA-2016-2582)).

Upgrading to version 3.2 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Vulnerability Center (SBV-56869) and Tenable (88771). Entries connected to this vulnerability are available at 81072 and 81073.



CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍



VulDB Base Score: 🔍
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Class: Privilege escalation
CWE: CWE-254
ATT&CK: T1211

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 88771
Nessus Name: openSUSE Security Update : libnettle (openSUSE-2016-211)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for compat-nettle27 FEDORA-2016-d94300845b
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nettle 3.2


02/01/2016 🔍
02/09/2016 +8 days 🔍
02/15/2016 +6 days 🔍
02/16/2016 +1 days 🔍
02/23/2016 +6 days 🔍
02/23/2016 +0 days 🔍
02/24/2016 +1 days 🔍
03/01/2016 +6 days 🔍
07/08/2022 +2319 days 🔍


Advisory: USN-2897-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8803 (🔍)
Vulnerability Center: 56869 - Nettle before 3.2 Local Unspecified Vulnerability in ecc-256.c - CVE-2015-8803, Medium

See also: 🔍


Created: 02/24/2016 09:28 AM
Updated: 07/08/2022 01:07 PM
Changes: (1) advisory_identifier
Complete: 🔍


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