blog: announce possible impact of openssl release

See: nodejs/node#32846

build.js

@@ -272,9 +272,9 @@ function getSource (callback) {
           lts: latestVersion.lts(versions)
         },
         banner: {
-          visible: false,
-          text: 'New security releases now available for all release lines',
-          link: '/en/blog/vulnerability/february-2020-security-releases/'
+          visible: true,
+          text: 'Security releases may be necessary for all release lines',
+          link: '/en/blog/vulnerability/april-2020-openssl-updates/'
         }
       }
     }

locale/en/blog/vulnerability/april-2020-openssl-updates.md

@@ -0,0 +1,53 @@
+---
+date: 2020-04-17T12:00:00.000Z
+category: vulnerability
+title: OpenSSL security releases may require Node.js security releases
+slug: openssl-and-low-severity-fixes-april-2020
+layout: blog-post.hbs
+author: Sam Roberts
+---
+
+### Summary
+
+The Node.js project may be releasing new versions across all of its supported
+release lines early next week to incorporate upstream patches from OpenSSL.
+Please read on for full details.
+
+### OpenSSL
+
+The OpenSSL project
+[announced](https://mta.openssl.org/pipermail/openssl-announce/2020-April/000170.html)
+this week that they will be releasing version 1.1.1g on the 21st of
+April. The highest severity issue that will be fixed in the release
+is "HIGH" severity under their
+[security policy](https://www.openssl.org/policies/secpolicy.html),
+meaning they are:
+
+> ... issues that are of a lower risk than critical, perhaps due to affecting
+> less common configurations, or which are less likely to be exploitable. 
+
+All supported versions of Node.js use OpenSSL v1.1.1, therefore all active
+release lines are impacted by this update.
+
+At this stage, due to embargo, the exact nature of these defects is uncertain
+as well as the impact they will have on Node.js users.
+
+After assessing the impact on Node.js, it will be decided whether the issues
+fixed require immediate security releases of Node.js, or whether they can be
+included in the normally scheduled updates.
+
+Please monitor the **nodejs-sec** Google Group for updates, including a
+decision within 24 hours after the OpenSSL release regarding release timing,
+and full details of the defects upon eventual release:
+https://groups.google.com/forum/#!forum/nodejs-sec
+
+### Contact and future updates
+
+The current Node.js security policy can be found at <https://nodejs.org/en/security/>,
+including information on how to report a vulnerability in Node.js.
+
+Subscribe to the low-volume announcement-only **nodejs-sec** mailing list at
+https://groups.google.com/forum/#!forum/nodejs-sec to stay up to date on
+security vulnerabilities and security-related releases of Node.js and the
+projects maintained in the
+[nodejs GitHub organisation](https://github.com/nodejs).