open-vulnerability-clients

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open-vulnerability-clients

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Java library for working with available vulnerability data sources (GitHub Security Advisories, NVD, EPSS, CISA Known Exploited Vulnerabilities, etc.)

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# open-vulnerability-clients

A collection of Java clients to access various vulnerability data-sources available
on the internet. Some of the data-sources require an API Key or Token to access the
API.

## NVD Links

- [Getting Started](https://nvd.nist.gov/developers/start-here)
- [Vulnerabilities API](https://nvd.nist.gov/developers/vulnerabilities)
- [Request an NVD API Key](https://nvd.nist.gov/developers/request-an-api-key)

See API usage examples below.

## GitHub Security Advisory Links

- [GitHub Security Advisory Database](https://docs.github.com/en/enterprise-cloud@latest/code-security/security-advisories/global-security-advisories/browsing-security-advisories-in-the-github-advisory-database)
- [Explorer](https://docs.github.com/en/graphql/overview/explorer)

See API usage examples below.

## Exploit Prediction Scoring System (EPSS) Links

- https://www.first.org/epss/

See API usage examples in the [open-vulnerability-store](https://github.com/jeremylong/Open-Vulnerability-Project/blob/b446bd01e0f4d9bd3c12a22226fd6755d2d6170e/open-vulnerability-store/src/main/java/io/github/jeremylong/openvulnerability/VulnerabilityService.java#L112) project.

## CISA Known Exploited Vulnerabilities Catalog

- https://www.cisa.gov/known-exploited-vulnerabilities-catalog

See API usage examples in the [open-vulnerability-store](https://github.com/jeremylong/Open-Vulnerability-Project/blob/b446bd01e0f4d9bd3c12a22226fd6755d2d6170e/open-vulnerability-store/src/main/java/io/github/jeremylong/openvulnerability/VulnerabilityService.java#L143) project.

## usage

### maven

```xml
<dependency>
   <groupId>io.github.jeremylong</groupId>
   <artifactId>open-vulnerability-clients</artifactId>
   <version>9.0.6</version>
</dependency>
```

### gradle

```groovy
implementation 'io.github.jeremylong:open-vulnerability-clients:9.0.6'
```

### api usage

The APIs are intended to be fairly simple; an example implementation is given below to retrieve the entire GitHub Security Advisory data
set - including a mechanism to keep the data up to date.

#### GitHub Security Advisory Example

A Personal Access Token is required to access the GitHub Security Advisory GraphQL endpoint.

```java
import io.github.jeremylong.openvulnerability.client.ghsa.GitHubSecurityAdvisoryClient;
import io.github.jeremylong.openvulnerability.client.ghsa.GitHubSecurityAdvisoryClientBuilder;
import io.github.jeremylong.openvulnerability.client.ghsa.SecurityAdvisory;

import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.util.List;

public class Example {
    
    ZonedDateTime retrieveLastUpdated() {
        // TODO implement a storage/retrieval mechanism for the last updated date.
        return ZonedDateTime.now(ZoneOffset.UTC).minusDays(1);
    }

void storeLastUpdated(ZonedDateTime lastUpdated) {
        // TODO implement a storage/retrieval mechanism for the last update time.
    }

@Test
    void testNext() throws Exception {
        String apiKey = System.getenv("GITHUB_TOKEN");

GitHubSecurityAdvisoryClientBuilder builder = GitHubSecurityAdvisoryClientBuilder
                .aGitHubSecurityAdvisoryClient()
                .withApiKey(apiKey);

ZonedDateTime lastUpdated = retrieveLastUpdated();
        if (lastUpdated != null) {
            builder.withUpdatedSinceFilter(lastUpdated);
        }
        try (GitHubSecurityAdvisoryClient client = builder.build()) {
            if (client.hasNext()) {
                List<SecurityAdvisory> result = client.next();
                if (result != null && !result.isEmpty()) {
                    //TODO do something useful with the SecurityAdvisories
                }
            }
            storeLastUpdated(client.getLastUpdated());
        }
    }
}
```

#### NVD API Example

An API Key for the NVD API is highly recommended - especially when downloading the  full Vulnerability Catalog from the
NVD. Without an API key downloading takes 10+ minutes; whereas with an API key (and using 4 threads) the entire NVD
Vulnerability Catalog can be downloaded in ~90 seconds.

```java
import io.github.jeremylong.openvulnerability.client.nvd.NvdCveClient;
import io.github.jeremylong.openvulnerability.client.nvd.NvdCveClientBuilder;
import io.github.jeremylong.openvulnerability.client.nvd.DefCveItem;

import java.time.ZonedDateTime;
import java.util.Collection;

public class Example {

ZonedDateTime retrieveLastUpdated() {
        // TODO implement a storage/retrieval mechanism.
        return null;
    }

void storeLasUpdated(ZonedDateTime lastUpdated) {
        // TODO implement a storage/retrieval mechanism.
    }

public void update() {
        ZonedDateTime lastModifiedRequest = retrieveLastUpdated();
        NvdCveClientBuilder builder = NvdCveClientBuilder.aNvdCveApi();
        if (lastModifiedRequest != null) {
            ZonedDateTime end = lastModifiedRequest.minusDays(-120);
            builder.withLastModifiedFilter(lastModifiedRequest, end);
        }
        //TODO add API key with builder's `withApiKey()`
        //TODO if an API Key is used consider adding `withThreadCount(4)`
        //TODO add any additional filters via the builder's `withFilter()`
        try (NvdCveClient api = builder.build()) {
            while (api.hasNext()) {
                Collection<DefCveItem> items = api.next();
                if (items != null && !items.isEmpty()) {
                    //TODO do something with the items
                }
            }
            lastModifiedRequest = api.getLastModifiedRequest();
        } catch (Exception e) {
            e.printStackTrace();
        }
        storeLasUpdated(lastModifiedRequest);
    }
}
```

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