USN-4040-2

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Source
https://ubuntu.com/security/notices/USN-4040-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4040-2.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-4040-2
Upstream
Related
Published
2019-06-26T19:44:22.228500Z
Modified
2025-10-14T16:37:36Z
Summary
expat vulnerability
Details

USN-4040-1 fixed a vulnerability in expat. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to cause a denial of service.

References

Affected packages

Ubuntu:Pro:14.04:LTS / expat

Package

Name
expat
Purl
pkg:deb/ubuntu/expat@2.1.0-4ubuntu1.4+esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.1.0-4ubuntu1.4+esm1

Affected versions

2.*

2.1.0-4
2.1.0-4ubuntu1
2.1.0-4ubuntu1.1
2.1.0-4ubuntu1.2
2.1.0-4ubuntu1.3
2.1.0-4ubuntu1.4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "expat",
            "binary_version": "2.1.0-4ubuntu1.4+esm1"
        },
        {
            "binary_name": "lib64expat1",
            "binary_version": "2.1.0-4ubuntu1.4+esm1"
        },
        {
            "binary_name": "lib64expat1-dev",
            "binary_version": "2.1.0-4ubuntu1.4+esm1"
        },
        {
            "binary_name": "libexpat1",
            "binary_version": "2.1.0-4ubuntu1.4+esm1"
        },
        {
            "binary_name": "libexpat1-dev",
            "binary_version": "2.1.0-4ubuntu1.4+esm1"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:14.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ],
            "id": "CVE-2018-20843"
        }
    ]
}