UBUNTU-CVE-2020-11080

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Source
https://ubuntu.com/security/CVE-2020-11080
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11080.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-11080
Upstream
Downstream
Related
Published
2020-06-03T23:15:00Z
Modified
2025-07-18T16:45:48Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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 nghttp2onframerecvcallback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.

References

Affected packages

Ubuntu:Pro:16.04:LTS / nghttp2

Package

Name
nghttp2
Purl
pkg:deb/ubuntu/nghttp2@1.7.1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.1-1ubuntu0.1~esm1

Affected versions

0.*

0.6.7-1

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libnghttp2-14-dbgsym",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libnghttp2-dev",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libnghttp2-doc",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "nghttp2",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "nghttp2-client",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "nghttp2-client-dbgsym",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "nghttp2-proxy-dbgsym",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "nghttp2-server",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "nghttp2-server-dbgsym",
            "binary_version": "1.7.1-1ubuntu0.1~esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Ubuntu:Pro:18.04:LTS / nghttp2

Package

Name
nghttp2
Purl
pkg:deb/ubuntu/nghttp2@1.30.0-1ubuntu1+esm1?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.30.0-1ubuntu1+esm1

Affected versions

1.*

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "libnghttp2-14-dbgsym",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "libnghttp2-dev",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "libnghttp2-doc",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "nghttp2",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "nghttp2-client",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "nghttp2-client-dbgsym",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "nghttp2-proxy-dbgsym",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "nghttp2-server",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        },
        {
            "binary_name": "nghttp2-server-dbgsym",
            "binary_version": "1.30.0-1ubuntu1+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:20.04:LTS / nghttp2

Package

Name
nghttp2
Purl
pkg:deb/ubuntu/nghttp2@1.40.0-1ubuntu0.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.40.0-1ubuntu0.1

Affected versions

1.*

1.39.2-1
1.40.0-1
1.40.0-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "libnghttp2-14-dbgsym",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "libnghttp2-dev",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "libnghttp2-doc",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "nghttp2",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-client",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-client-dbgsym",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-proxy-dbgsym",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-server",
            "binary_version": "1.40.0-1ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-server-dbgsym",
            "binary_version": "1.40.0-1ubuntu0.1"
        }
    ],
    "availability": "No subscription required"
}