CVE-2016-7055 Details
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.
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Exploit prediction scoring system (EPSS) score for CVE-2016-7055
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
6.98 Probability of exploitation activity being observed over the next 30 days (91st percentile)
CVSS score for CVE-2016-7055
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
5.9 Medium
Products affected by CVE-2016-7055
OpenSSL 1.0.2
OpenSSL 1.0.2a
OpenSSL 1.0.2c
OpenSSL 1.0.2d
OpenSSL 1.0.2e
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Not available
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CVE-2016-7055 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
CN 798 15.04%
US 737 13.89%
DE 286 5.39%
KR 240 4.52%
ID 224 4.22%
JP 223 4.20%
FR 205 3.86%
RU 174 3.28%
HU 163 3.07%
IT 147 2.77%

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CVE-2016-7055 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 1,990 61.72%
Telecommunications 941 29.19%
Education 125 3.88%
Government/Politics 46 1.43%
Business Services 35 1.09%
Utilities 12 0.37%
Consumer Goods 9 0.28%
Manufacturing 9 0.28%
Tourism/Hospitality 8 0.25%
Retail 7 0.22%

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