UBUNTU-CVE-2021-3541

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Source
https://ubuntu.com/security/CVE-2021-3541
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3541.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3541
Upstream
Downstream
Related
Published
2021-05-18T00:00:00Z
Modified
2025-09-08T16:46:44Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

References

Affected packages

Ubuntu:20.04:LTS / libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2@2.9.10+dfsg-5ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.9.10+dfsg-5ubuntu0.20.04.1

Affected versions

2.*

2.9.4+dfsg1-7ubuntu3
2.9.4+dfsg1-7ubuntu5
2.9.4+dfsg1-8ubuntu1
2.9.4+dfsg1-8ubuntu2
2.9.4+dfsg1-8ubuntu3
2.9.10+dfsg-1ubuntu3
2.9.10+dfsg-4build1
2.9.10+dfsg-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1",
            "binary_name": "libxml2"
        },
        {
            "binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1",
            "binary_name": "libxml2-dev"
        },
        {
            "binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1",
            "binary_name": "libxml2-utils"
        },
        {
            "binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1",
            "binary_name": "python-libxml2"
        },
        {
            "binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1",
            "binary_name": "python3-libxml2"
        }
    ],
    "availability": "No subscription required"
}