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CVE-2021-20220

CVE-2021-20220

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own. The highest threat from this vulnerability is to data confidentiality and integrity.

CVSS 4.8 · Medium · EPSS 1.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • undertow

    Versions
    • Undertow 2.2.0.Final, Undertow 2.1.6.Final, Undertow 2.0.34.Final: Affected

    No fix published

  • undertow Debian:14

    Versions
    • 1.3.11-1
    • 1.3.16-1
    • 1.3.19-1
    • 1.3.21-1
    • 1.3.23-1
    • 1.3.4-1
    • 1.3.5-1
    • 1.3.7-1
    • 1.4.0-1
    • 1.4.1-1
    • 1.4.18-1
    • 1.4.20-1
    • 1.4.21-1
    • 1.4.21-2
    • 1.4.22-1
    • 1.4.23-1
    • 1.4.23-2
    • 1.4.23-3
    • 1.4.25-1
    • 1.4.25-2
    • 1.4.3-1
    • 1.4.4-1
    • 1.4.6-1
    • 1.4.7-1
    • 1.4.8-1
    • 2.0.23-1
    • 2.0.25-1
    • 2.0.26-1
    • 2.0.27-1
    • 2.0.28-1
    • 2.0.29-1
    • 2.0.30-1
    • 2.1.0-1
    • 2.1.1-1
    • 2.1.3-1
    Affected ranges
    • ECOSYSTEM: < 2.2.0-1

    Update to 2.2.0-1

  • undertow Ubuntu:Pro:16.04:LTS

    Versions
    • 1.3.4-1
    • 1.3.5-1
    • 1.3.7-1
    • 1.3.11-1
    • 1.3.16-1
    • 1.3.16-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • undertow Ubuntu:Pro:18.04:LTS

    Versions
    • 1.4.20-1
    • 1.4.21-1
    • 1.4.22-1
    • 1.4.23-1
    • 1.4.23-2build1
    • 1.4.23-3
    • 1.4.23-3ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • undertow Ubuntu:Pro:20.04:LTS

    Versions
    • 2.0.23-1
    • 2.0.27-1
    • 2.0.28-1
    • 2.0.29-1
    • 2.0.29-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • undertow Ubuntu:Pro:22.04:LTS

    Versions
    • 2.2.8-1
    • 2.2.12-1
    • 2.2.13-1
    • 2.2.14-1
    • 2.2.16-1
    • 2.2.16-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • undertow Ubuntu:Pro:24.04:LTS

    Versions
    • 2.3.8-2
    • 2.3.8-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • undertow Ubuntu:25.10

    Versions
    • 2.3.18-1
    • 2.3.18-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • undertow Ubuntu:26.10

    Versions
    • 2.3.20-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • undertow Ubuntu:26.04:LTS

    Versions
    • 2.3.18-2
    • 2.3.20-1
    • 2.3.20-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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