UBUNTU-CVE-2020-11934

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Source

https://ubuntu.com/security/CVE-2020-11934

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11934.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-11934

Related

Published

2020-07-15T12:00:00Z

Modified

2025-06-02T17:11:36Z

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N CVSS Calculator
5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N CVSS Calculator

Summary

[none]

Details

It was discovered that snapctl user-open allowed altering the $XDGDATADIRS environment variable when calling the system xdg-open. OpenURL() in usersession/userd/launcher.go would alter $XDGDATADIRS to append a path to a directory controlled by the calling snap. A malicious snap could exploit this to bypass intended access restrictions to control how the host system xdg-open script opens the URL and, for example, execute a script shipped with the snap without confinement. This issue did not affect Ubuntu Core systems. Fixed in snapd versions 2.45.1ubuntu0.2, 2.45.1+18.04.2 and 2.45.1+20.04.2.

References

Affected packages

Ubuntu:16.04:LTS / snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd@2.45.1ubuntu0.2?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.45.1ubuntu0.2

Affected versions

1.*

1.9

1.9.1.1

1.9.2

2.*

2.0

2.0.1

2.0.2

2.0.3

2.0.5

2.0.8

2.0.9

2.0.10

2.11+0.16.04

2.12+0.16.04

2.13

2.14.2~16.04

2.15.2ubuntu1

2.16ubuntu3

2.17.1ubuntu1

2.20.1ubuntu1

2.21

2.22.2

2.22.3

2.22.6

2.23.1

2.24.1

2.25

2.26.10

2.27.5

2.28.5

2.29.4.2

2.32.3.2

2.32.9

2.33.1ubuntu2

2.34.2

2.34.2ubuntu0.1

2.37.4

2.37.4ubuntu0.1

2.38

2.39.2

2.39.2ubuntu0.2

2.40

2.42.1

2.45.1

Ecosystem specific

{
    "ubuntu_priority": "medium",
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "snapd-dbgsym",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.45.1ubuntu0.2"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.45.1ubuntu0.2"
        }
    ]
}

Ubuntu:18.04:LTS / snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd@2.45.1+18.04.2?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.45.1+18.04.2

Affected versions

2.*

2.28.5+17.10

2.29.4.1+18.04

2.29.4.2+18.04

2.31.1+18.04

2.32+18.04~pre5

2.32+18.04~pre6

2.32+18.04

2.32.3.2+18.04

2.32.5+18.04

2.32.8+18.04

2.32.9+18.04

2.33.1+18.04ubuntu2

2.34.2+18.04

2.34.2+18.04.1

2.37.1+18.04

2.37.1.1+18.04

2.37.4+18.04

2.37.4+18.04.1

2.38+18.04

2.39.2+18.04

2.40+18.04

2.42.1+18.04

2.45.1+18.04

Ecosystem specific

{
    "ubuntu_priority": "medium",
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "snapd-dbgsym",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.45.1+18.04.2"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.45.1+18.04.2"
        }
    ]
}

Ubuntu:20.04:LTS / snapd

Package

Name: snapd
Purl: pkg:deb/ubuntu/snapd@2.45.1+20.04.2?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.45.1+20.04.2

Affected versions

2.*

2.41+19.10.1

2.42.1+20.04

2.43.3+git1.8109f8

2.44~pre1+20.04

2.44+20.04

2.44.2+20.04

2.44.3+20.04

2.45.1+20.04

Ecosystem specific

{
    "ubuntu_priority": "medium",
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "snapd-dbgsym",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.45.1+20.04.2"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.45.1+20.04.2"
        }
    ]
}