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CVE-2020-11080

CVE-2020-11080 · Denial of service in nghttp2

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

In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.

CVSS 3.7 · Low · EPSS 5.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • nghttp2

    Versions
    • < 1.41.0: Affected

    No fix published

  • nghttp2 Debian:12

    Affected ranges
    • ECOSYSTEM: < 1.41.0-1

    Update to 1.41.0-1

  • nghttp2 Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.41.0-1

    Update to 1.41.0-1

  • nghttp2 Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.41.0-1

    Update to 1.41.0-1

  • nodejs Debian:12

    Affected ranges
    • ECOSYSTEM: < 10.21.0~dfsg-1

    Update to 10.21.0~dfsg-1

  • nodejs Debian:13

    Affected ranges
    • ECOSYSTEM: < 10.21.0~dfsg-1

    Update to 10.21.0~dfsg-1

  • nodejs Debian:14

    Affected ranges
    • ECOSYSTEM: < 10.21.0~dfsg-1

    Update to 10.21.0~dfsg-1

  • nghttp2 Ubuntu:Pro:16.04:LTS

    Versions
    • 0.6.7-1
    • 1.3.4-2
    • 1.4.0-1
    • 1.4.0-2
    • 1.5.0-2
    • 1.6.0-1
    • 1.7.0-1
    • 1.7.1-1
    Affected ranges
    • ECOSYSTEM: < 1.7.1-1ubuntu0.1~esm1

    Update to 1.7.1-1ubuntu0.1~esm1

  • nghttp2 Ubuntu:Pro:18.04:LTS

    Versions
    • 1.25.0-1
    • 1.27.0-1
    • 1.28.0-1
    • 1.29.0-1
    • 1.29.0-1build1
    • 1.30.0-1
    • 1.30.0-1ubuntu1
    Affected ranges
    • ECOSYSTEM: < 1.30.0-1ubuntu1+esm1

    Update to 1.30.0-1ubuntu1+esm1

  • nghttp2 Ubuntu:20.04:LTS

    Versions
    • 1.39.2-1
    • 1.40.0-1
    • 1.40.0-1build1
    Affected ranges
    • ECOSYSTEM: < 1.40.0-1ubuntu0.1

    Update to 1.40.0-1ubuntu0.1

Original sources

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