CVE-2018-1312 Details
In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2018-1312
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%).
2.01 Probability of exploitation activity being observed over the next 30 days (83rd percentile)
CVSS score for CVE-2018-1312
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.
9.8 Critical
Products affected by CVE-2018-1312

CVE-2018-1312 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 754,540 28.63%
DE 325,949 12.37%
FR 153,174 5.81%
JP 142,864 5.42%
NL 105,554 4.01%
GB 89,304 3.39%
RU 75,650 2.87%
CA 73,201 2.78%
IT 69,120 2.62%
KR 68,716 2.61%

Is CVE-2018-1312 part of your extended attack surface? Bitsight helps security leaders rapidly identify exposure and detect threats in order to prioritize, communicate, and mitigate risk.

View interactive product tours

CVE-2018-1312 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 1,545,352 80.57%
Telecommunications 268,471 14.00%
Education 47,147 2.46%
Government/Politics 16,301 0.85%
Business Services 8,975 0.47%
Manufacturing 4,592 0.24%
Media/Entertainment 3,959 0.21%
Energy/Resources 3,233 0.17%
Utilities 3,196 0.17%
Transportation 2,633 0.14%

Bitsight, the leading provider in Cyber Risk Management, introduced the next-generation internet scanner Bitsight Groma in May 2024. This technology continuously scans the entire internet to discover assets, collect asset attribution evidence, and identify an ever-growing set of security observations, such as vulnerabilities and misconfigurations. Groma’s scanning activities presently encompass:


  • 40 million-plus monitored organizations
  • 250 million-plus host names
  • 4 billion-plus routable IPv4 and IPv6 addresses

Greynoise’s recent study testifies the speed of Bitsight Groma.

Bitsight data discovery
Governance charcoal background

Bitsight TRACE team investigates security incidents and identifies vulnerabilities and threats.

View latest security research 

See what you’re up against across the expanding attack surface. Prioritize what matters most. And mitigate where you’re most vulnerable.

External Attack Surface Management

Bitsight ASA Report Image

Reducing exposure starts with knowing exactly how your external attack surface stands—from your overall standing to each digital and cloud asset around the world. Bitsight's custom report gives you the insights you need to see your entire external attack surface.