UBUNTU-CVE-2021-3541
- 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
- 2025-07-16T07:42:51.544158Z
- 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
-
- https://ubuntu.com/security/CVE-2021-3541
- https://bugzilla.redhat.com/show_bug.cgi?id=1950515
- https://gitlab.gnome.org/GNOME/libxml2/-/commit/8598060bacada41a0eb09d95c97744ff4e428f8e
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/228
- https://blog.hartwork.org/posts/cve-2021-3541-parameter-laughs-fixed-in-libxml2-2-9-11/
- https://ubuntu.com/security/notices/USN-4991-1
- https://www.cve.org/CVERecord?id=CVE-2021-3541
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
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.9.10+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_name": "libxml2",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
},
{
"binary_name": "libxml2-dbgsym",
"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-doc",
"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": "libxml2-utils-dbgsym",
"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": "python-libxml2-dbg",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
},
{
"binary_name": "python3-libxml2",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
},
{
"binary_name": "python3-libxml2-dbg",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
}
],
"availability": "No subscription required"
}