National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2015-8803 Detail

Description

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.

Source:  MITRE      Last Modified:  02/23/2016

Quick Info

CVE Dictionary Entry:
CVE-2015-8803
Original release date:
02/23/2016
Last revised:
01/04/2018
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
9.8 Critical
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (legend)
Impact Score:
5.9
Exploitability Score:
3.9
CVSS Version 3 Metrics:
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High
CVSS Severity (version 2.0):
CVSS v2 Base Score:
7.5 HIGH
Vector:
(AV:N/AC:L/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore:
6.4
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector:
Network exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource Type Source Name
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176807.html External Source FEDORA FEDORA-2016-89968f88d2
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177229.html External Source FEDORA FEDORA-2016-aa00f0631d
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177473.html External Source FEDORA FEDORA-2016-8ee88aee21
http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html External Source SUSE openSUSE-SU-2016:0475
http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html External Source SUSE openSUSE-SU-2016:0477
http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html External Source SUSE openSUSE-SU-2016:0486
http://rhn.redhat.com/errata/RHSA-2016-2582.html External Source REDHAT RHSA-2016:2582
http://www.openwall.com/lists/oss-security/2016/02/02/2 External Source MLIST [oss-security] 20160202 Miscomputations of elliptic curve scalar multiplications in Nettle
http://www.openwall.com/lists/oss-security/2016/02/03/1 External Source MLIST [oss-security] 20160202 Re: Miscomputations of elliptic curve scalar multiplications in Nettle
http://www.ubuntu.com/usn/USN-2897-1 External Source UBUNTU USN-2897-1
https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html External Source MISC https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html
https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d Patch External Source CONFIRM https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d
https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html External Source MLIST [info-gnu] 20160128 ANNOUNCE: Nettle-3.2
https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html Vendor Advisory External Source MLIST [nettle-bugs] 20151212 secp256 calculation bug (already fixed)

Technical Details

Vulnerability Type (View All)

Change History 5 change records found - show changes