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CVE-2015-8803

Good to know:

Date: February 23, 2016

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.

Language: C

Severity Score

9.8

Related Resources (18)

Url: https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html

Url: https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d

Url: https://access.redhat.com/security/cve/CVE-2015-8803

Url: https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html

Url: http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html

Url: http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176807.html

Url: https://nvd.nist.gov/vuln/detail/CVE-2015-8803

Url: http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177473.html

Url: http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html

Url: http://www.openwall.com/lists/oss-security/2016/02/02/2

Url: http://www.openwall.com/lists/oss-security/2016/02/03/1

Url: http://rhn.redhat.com/errata/RHSA-2016-2582.html

Url: https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html

Url: http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177229.html

Url: http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html

Url: https://security-tracker.debian.org/tracker/CVE-2015-8803

Url: http://www.ubuntu.com/usn/USN-2897-1

Url: https://www.mend.io/vulnerability-database/CVE-2015-8803

Severity Score

9.8

Weakness Type (CWE)

Cryptographic Issues

CWE-310

Security Features

CWE-254

Top Fix

Upgrade Version

Upgrade to version 3.2

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CVSS v3.1

Base Score:	9.8
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 v2

Base Score:	7.5
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	PARTIAL
Availability (A):	PARTIAL
Additional information:

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CVE-2015-8803

Good to know:

Date: February 23, 2016

Language: C

Severity Score

Related Resources (18)

Severity Score

Weakness Type (CWE)

Top Fix

Upgrade Version

CVSS v3.1

CVSS v2

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