CVE-2021-21294: Unbounded connection acceptance in http4s-blaze-server

CVE-2021-21294 · Severity: low · CVSS 3.1 · Published 2021-02-02

Unbounded connection acceptance in http4s-blaze-server

Technologies: org.http4s:http4s-blaze-server_2.13 (Maven). Vendors: Maven.

Quick answers

Is CVE-2021-21294 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-21294 being exploited in the wild.
How severe is CVE-2021-21294?
Low severity, with a CVSS score of 3.1, published 2 February 2021.
Which products and versions are affected?
org.http4s:http4s-blaze-server_2.12 (Maven) ECOSYSTEM:introduced=0,fixed=0.21.17; org.http4s:http4s-blaze-server_2.13 (Maven) ECOSYSTEM:introduced=0,fixed=0.21.17.
Is there a fix for CVE-2021-21294?
Yes. org.http4s:http4s-blaze-server_2.12 (Maven): upgrade to 0.21.17 or later; org.http4s:http4s-blaze-server_2.13 (Maven): upgrade to 0.21.17 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-21294?
Check whether you run org.http4s:http4s-blaze-server_2.12 (Maven) or org.http4s:http4s-blaze-server_2.13 (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.http4s:http4s-blaze-server_2.12 (Maven): upgrade to 0.21.17 or later
    # set org.http4s:http4s-blaze-server_2.12 to 0.21.17 in your pom.xml or build.gradle
  • org.http4s:http4s-blaze-server_2.13 (Maven): upgrade to 0.21.17 or later
    # set org.http4s:http4s-blaze-server_2.13 to 0.21.17 in your pom.xml or build.gradle

Affected products

  • org.http4s:http4s-blaze-server_2.12 (Maven) ECOSYSTEM:introduced=0,fixed=0.21.17
  • org.http4s:http4s-blaze-server_2.13 (Maven) ECOSYSTEM:introduced=0,fixed=0.21.17

Identifiers

  • CVE-2021-21294
  • GHSA-xhv5-w9c5-2r2w

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