There is a carry propagating bug in the Broadwell-specific Montgomery multiplication…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 fixed, 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
There 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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* | 1.0.2 to before 1.0.2k; 1.1.0 to before 1.1.0c | Vulnerable | OpenSSL |
| cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* | 4.0.0 – 4.1.2 | Vulnerable | NodeJS |
| cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* | 4.2.0 to before 4.7.3 | Vulnerable | NodeJS |
| cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* | 6.0.0 – 6.8.1 | Vulnerable | NodeJS |
| cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* | 6.9.0 to before 6.9.5 | Vulnerable | NodeJS |
| cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* | 7.0.0 to before 7.5.0 | Vulnerable | NodeJS |
- cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* Versions 1.0.2 to before 1.0.2k; 1.1.0 to before 1.1.0c Vulnerable ·OpenSSL
- cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 4.0.0 – 4.1.2 Vulnerable ·NodeJS
- cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* Versions 4.2.0 to before 4.7.3 Vulnerable ·NodeJS
- cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 6.0.0 – 6.8.1 Vulnerable ·NodeJS
- cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* Versions 6.9.0 to before 6.9.5 Vulnerable ·NodeJS
- cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 7.0.0 to before 7.5.0 Vulnerable ·NodeJS
Remediation
Red Hat 3 advisories
- RHSA-2018:2186 Released 2018-07-12 · Red Hat rating ModerateRed Hat JBoss Core Services Apache HTTP Server 2.4.29 RHEL 6 security update
- Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apache-commons-daemon-1.1.0-1.redhat_2.1.jbcs.el6, jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el6, jbcs-httpd24-apr-1.6.3-14.jbcs.el6 +34
- RHSA-2018:2185 Released 2018-07-12 · Red Hat rating ModerateRed Hat JBoss Core Services Apache HTTP Server 2.4.29 RHEL 7 security update
- Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apache-commons-daemon-1.1.0-1.redhat_2.1.jbcs.el7, jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el7, jbcs-httpd24-apr-1.6.3-14.jbcs.el7 +34
- RHSA-2018:2187 Released 2018-07-12 · Red Hat rating ModerateRed Hat JBoss Core Services Apache HTTP Server 2.4.29 security update
- Red Hat JBoss Core Services
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat JBoss Core Services | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Application Platform 6 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Web Server 2 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Core Services | Fixed | RHSA-2018:2187 |
| Red Hat JBoss Core Services on RHEL 6 Server | Fixed | RHSA-2018:2186 |
| Red Hat JBoss Core Services on RHEL 7 Server | Fixed | RHSA-2018:2185 |
Not affected: 6 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat JBoss Enterprise Web Server 1
- Red Hat JBoss Enterprise Web Server 3
- Red Hat JBoss Web Server 3
Timeline
- 2026-10-02 Threatist record created from CVE-2016-7055
- 2026-10-03 Alias added: GHSA-hxpw-pxmm-q49r
References
Patch 4
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Advisory 9
- RHSA-2018:2185
- RHSA-2018:2186
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03744en_us
- FreeBSD-SA-17:02
- https://www.tenable.com/security/tns-2017-04
- GLSA-201702-07
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbgn03752en_us
- RHSA-2018:2187
- https://www.openssl.org/news/secadv/20161110.txt
Sources
- CVE-2016-7055 · CVE Program
- CVE-2016-7055 · NVD
- FIRST EPSS
- GHSA-hxpw-pxmm-q49r · GitHub Advisory Database · CC BY 4.0
- CVE-2016-7055 · Red Hat security data · CC BY 4.0
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