CVE-2016-7055

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Summary

CVECVE-2016-7055
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-05-04 20:29:00 UTC
Updated2025-04-20 01:37:25 UTC
DescriptionThere is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure in OpenSSL 1.0.2 and 1.1.0 before 1.1.0c that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary2.6AV:N/AC:H/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
High
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:H/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openssl Openssl All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com Third Party Advisory, VDB Entry
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
security.FreeBSD.org/advisories/FreeBSD-SA-17:02.openssl.asc af854a3a-2127-422b-91ae-364da2661108 security.FreeBSD.org Third Party Advisory
OpenSSL CVE-2016-7055 Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, US Government Resource, VDB Entry
[R5] SecurityCenter 5.4.3 Fixes Multiple Vulnerabilities - Security Advisory | Tenable Network Security af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com Third Party Advisory
Oracle Critical Patch Update - October 2017 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Oracle Critical Patch Update - January 2018 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Oracle Critical Patch Update Advisory - April 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Oracle Critical Patch Update - July 2017 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
OpenSSL Multiple Bugs Let Remote Users Cause the Target Application to Crash - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
OpenSSL: Multiple vulnerabilities (GLSA 201702-07) — Gentoo Security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
www.openssl.org/news/secadv/20161110.txt af854a3a-2127-422b-91ae-364da2661108 www.openssl.org Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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