Nettle 3.1 ecc-256.c ecc_256_modp 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Nettle 3.1. Affected by this issue is the function ecc_256_modp of the file ecc-256.c. The manipulation leads to 7pk security. This vulnerability is documented as CVE-2015-8803. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

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 7pk security vulnerability. Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8805.

The weakness was released 02/23/2016 (Website). It is possible to read the advisory at lists.lysator.liu.se. 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 l. 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 Tenable (88771) and Vulnerability Center (SBV-56869†). Entries connected to this vulnerability are available at VDB-81072 and VDB-81073. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nettle 3.2
Patch: git.lysator.liu.se

Timelineinfo

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 🔍

Sourcesinfo

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

CVE: CVE-2015-8803 (🔍)
GCVE (CVE): GCVE-0-2015-8803
GCVE (VulDB): GCVE-100-81071
Vulnerability Center: 56869 - Nettle before 3.2 Local Unspecified Vulnerability in ecc-256.c - CVE-2015-8803, Medium

See also: 🔍

Entryinfo

Created: 02/24/2016 09:28
Updated: 07/08/2022 13:07
Changes: 02/24/2016 09:28 (65), 08/24/2018 09:26 (15), 07/08/2022 13:00 (5), 07/08/2022 13:07 (1)
Complete: 🔍
Cache ID: 216::103

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