UBUNTU-CVE-2020-11076

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2020-11076
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11076.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-11076
Upstream
Downstream
Related
Published
2020-05-22T15:15:00Z
Modified
2025-07-18T16:45:48Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In Puma (RubyGem) before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.

References

Affected packages

Ubuntu:Pro:20.04:LTS / puma

Package

Name
puma
Purl
pkg:deb/ubuntu/puma@3.12.4-1ubuntu2+esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.12.4-1ubuntu2+esm1

Affected versions

3.*

3.12.0-2ubuntu1
3.12.0-4ubuntu1
3.12.4-1ubuntu2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "puma",
            "binary_version": "3.12.4-1ubuntu2+esm1"
        },
        {
            "binary_name": "puma-dbgsym",
            "binary_version": "3.12.4-1ubuntu2+esm1"
        }
    ]
}