CVE-2015-8805

nettle: secp256 calculation bug

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The ecc_256_modq 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-2015-8803.

La función ecc_256_modq en ecc-256.c en Nettle en versiones anteriores a 3.2 no maneja correctamente la propagación de acarreo y produce una salida incorrecta en su implementación de la curva elíptica P-256 NIST, lo que permite a atacantes tener un impacto no especificado a través de vectores desconocidos, una vulnerabilidad diferente a CVE-2015-8803.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-02-02 CVE Reserved
2016-02-15 CVE Published
2024-08-06 CVE Updated
2024-10-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-310: Cryptographic Issues
CWE-358: Improperly Implemented Security Check for Standard

CAPEC

References (12)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/02/02/2	Mailing List
http://www.openwall.com/lists/oss-security/2016/02/03/1	Mailing List
http://www.securityfocus.com/bid/84272	Vdb Entry
https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html	X_refsource_misc

URL	Date	SRC

URL	Date	SRC
https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d	2018-10-30

URL	Date	SRC
http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html	2018-10-30
http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html	2018-10-30
http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html	2018-10-30
http://rhn.redhat.com/errata/RHSA-2016-2582.html	2018-10-30
http://www.ubuntu.com/usn/USN-2897-1	2018-10-30
https://access.redhat.com/security/cve/CVE-2015-8805	2016-11-03
https://bugzilla.redhat.com/show_bug.cgi?id=1304382	2016-11-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nettle Project Search vendor "Nettle Project"		Nettle Search vendor "Nettle Project" for product "Nettle"				<= 3.1.1 Search vendor "Nettle Project" for product "Nettle" and version " <= 3.1.1"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				15.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.10"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.1 Search vendor "Opensuse" for product "Leap" and version "42.1"		-		Affected
Opensuse Search vendor "Opensuse"		Opensuse Search vendor "Opensuse" for product "Opensuse"				13.1 Search vendor "Opensuse" for product "Opensuse" and version "13.1"		-		Affected
Opensuse Search vendor "Opensuse"		Opensuse Search vendor "Opensuse" for product "Opensuse"				13.2 Search vendor "Opensuse" for product "Opensuse" and version "13.2"		-		Affected