UBUNTU-CVE-2020-4044

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Source
https://ubuntu.com/security/CVE-2020-4044
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-4044.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-4044
Related
Published
2020-06-30T16:15:00Z
Modified
2025-01-13T10:22:09Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well.

References

Affected packages

Ubuntu:Pro:14.04:LTS / xrdp

Package

Name
xrdp
Purl
pkg:deb/ubuntu/xrdp@0.6.0-1ubuntu0.1+esm2?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.0-1ubuntu0.1+esm2

Affected versions

0.*

0.6.0-1
0.6.0-1ubuntu0.1
0.6.0-1ubuntu0.1+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "0.6.0-1ubuntu0.1+esm2",
            "binary_name": "xrdp"
        },
        {
            "binary_version": "0.6.0-1ubuntu0.1+esm2",
            "binary_name": "xrdp-dbgsym"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / xrdp

Package

Name
xrdp
Purl
pkg:deb/ubuntu/xrdp@0.6.1-2ubuntu0.3+esm2?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.1-2ubuntu0.3+esm2

Affected versions

0.*

0.6.1-2
0.6.1-2ubuntu0.1
0.6.1-2ubuntu0.3
0.6.1-2ubuntu0.3+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "0.6.1-2ubuntu0.3+esm2",
            "binary_name": "xrdp"
        },
        {
            "binary_version": "0.6.1-2ubuntu0.3+esm2",
            "binary_name": "xrdp-dbgsym"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / xrdp

Package

Name
xrdp
Purl
pkg:deb/ubuntu/xrdp@0.9.5-2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.5-2ubuntu0.1~esm1

Affected versions

0.*

0.9.1-9
0.9.4-1
0.9.4-2
0.9.4-3
0.9.4-4
0.9.4-5
0.9.5-1
0.9.5-1build1
0.9.5-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "0.9.5-2ubuntu0.1~esm1",
            "binary_name": "xorgxrdp"
        },
        {
            "binary_version": "0.9.5-2ubuntu0.1~esm1",
            "binary_name": "xorgxrdp-dbgsym"
        },
        {
            "binary_version": "0.9.5-2ubuntu0.1~esm1",
            "binary_name": "xrdp"
        },
        {
            "binary_version": "0.9.5-2ubuntu0.1~esm1",
            "binary_name": "xrdp-dbgsym"
        },
        {
            "binary_version": "0.9.5-2ubuntu0.1~esm1",
            "binary_name": "xrdp-pulseaudio-installer"
        }
    ]
}

Ubuntu:20.04:LTS / xrdp

Package

Name
xrdp
Purl
pkg:deb/ubuntu/xrdp@0.9.12-1ubuntu0.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.12-1ubuntu0.1

Affected versions

0.*

0.9.9-1
0.9.12-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "0.9.12-1ubuntu0.1",
            "binary_name": "xrdp"
        },
        {
            "binary_version": "0.9.12-1ubuntu0.1",
            "binary_name": "xrdp-dbgsym"
        }
    ]
}