UBUNTU-CVE-2020-8833

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Source
https://ubuntu.com/security/CVE-2020-8833
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8833.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-8833
Upstream
Downstream
Related
Published
2020-04-02T00:00:00Z
Modified
2026-02-04T04:25:01.413397Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • 5.6 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.

References

Affected packages

Ubuntu:Pro:14.04:LTS / apport

Package

Name
apport
Purl
pkg:deb/ubuntu/apport@2.14.1-0ubuntu3.29+esm4?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.14.1-0ubuntu3.29+esm4

Affected versions

2.*
2.12.5-0ubuntu2
2.12.6-0ubuntu1
2.12.7-0ubuntu1
2.12.7-0ubuntu2
2.12.7-0ubuntu3
2.12.7-0ubuntu6
2.13.1-0ubuntu1
2.13.1-0ubuntu2
2.13.2-0ubuntu2
2.13.2-0ubuntu3
2.13.2-0ubuntu4
2.13.2-0ubuntu5
2.13.3-0ubuntu1
2.14-0ubuntu1
2.14.1-0ubuntu1
2.14.1-0ubuntu2
2.14.1-0ubuntu3
2.14.1-0ubuntu3.1
2.14.1-0ubuntu3.2
2.14.1-0ubuntu3.3
2.14.1-0ubuntu3.4
2.14.1-0ubuntu3.5
2.14.1-0ubuntu3.6
2.14.1-0ubuntu3.7
2.14.1-0ubuntu3.8
2.14.1-0ubuntu3.9
2.14.1-0ubuntu3.10
2.14.1-0ubuntu3.11
2.14.1-0ubuntu3.12
2.14.1-0ubuntu3.13
2.14.1-0ubuntu3.15
2.14.1-0ubuntu3.16
2.14.1-0ubuntu3.18
2.14.1-0ubuntu3.19
2.14.1-0ubuntu3.20
2.14.1-0ubuntu3.21
2.14.1-0ubuntu3.23
2.14.1-0ubuntu3.24
2.14.1-0ubuntu3.25
2.14.1-0ubuntu3.27
2.14.1-0ubuntu3.28
2.14.1-0ubuntu3.29
2.14.1-0ubuntu3.29+esm1
2.14.1-0ubuntu3.29+esm2
2.14.1-0ubuntu3.29+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "apport"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "apport-gtk"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "apport-kde"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "apport-noui"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "apport-retrace"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "apport-valgrind"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "dh-apport"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "python-apport"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "python-problem-report"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "python3-apport"
        },
        {
            "binary_version": "2.14.1-0ubuntu3.29+esm4",
            "binary_name": "python3-problem-report"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8833.json"

Ubuntu:16.04:LTS / apport

Package

Name
apport
Purl
pkg:deb/ubuntu/apport@2.20.1-0ubuntu2.23?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.20.1-0ubuntu2.23

Affected versions

2.*
2.19.1-0ubuntu3
2.19.2-0ubuntu1
2.19.2-0ubuntu2
2.19.2-0ubuntu3
2.19.2-0ubuntu4
2.19.2-0ubuntu5
2.19.2-0ubuntu6
2.19.2-0ubuntu8
2.19.2-0ubuntu9
2.19.3-0ubuntu1
2.19.3-0ubuntu2
2.19.3-0ubuntu3
2.19.4-0ubuntu1
2.19.4-0ubuntu2
2.20-0ubuntu2
2.20-0ubuntu3
2.20.1-0ubuntu1
2.20.1-0ubuntu2
2.20.1-0ubuntu2.1
2.20.1-0ubuntu2.2
2.20.1-0ubuntu2.4
2.20.1-0ubuntu2.5
2.20.1-0ubuntu2.6
2.20.1-0ubuntu2.9
2.20.1-0ubuntu2.10
2.20.1-0ubuntu2.12
2.20.1-0ubuntu2.13
2.20.1-0ubuntu2.14
2.20.1-0ubuntu2.15
2.20.1-0ubuntu2.16
2.20.1-0ubuntu2.17
2.20.1-0ubuntu2.18
2.20.1-0ubuntu2.19
2.20.1-0ubuntu2.20
2.20.1-0ubuntu2.21
2.20.1-0ubuntu2.22

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "apport"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "apport-gtk"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "apport-kde"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "apport-noui"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "apport-retrace"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "apport-valgrind"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "dh-apport"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "python-apport"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "python-problem-report"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "python3-apport"
        },
        {
            "binary_version": "2.20.1-0ubuntu2.23",
            "binary_name": "python3-problem-report"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8833.json"

Ubuntu:18.04:LTS / apport

Package

Name
apport
Purl
pkg:deb/ubuntu/apport@2.20.9-0ubuntu7.14?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.20.9-0ubuntu7.14

Affected versions

2.*
2.20.7-0ubuntu3
2.20.7-0ubuntu3.1
2.20.7-0ubuntu4
2.20.8-0ubuntu1
2.20.8-0ubuntu2
2.20.8-0ubuntu3
2.20.8-0ubuntu4
2.20.8-0ubuntu5
2.20.8-0ubuntu6
2.20.8-0ubuntu7
2.20.8-0ubuntu8
2.20.8-0ubuntu9
2.20.8-0ubuntu10
2.20.9-0ubuntu1
2.20.9-0ubuntu2
2.20.9-0ubuntu4
2.20.9-0ubuntu5
2.20.9-0ubuntu6
2.20.9-0ubuntu7
2.20.9-0ubuntu7.1
2.20.9-0ubuntu7.2
2.20.9-0ubuntu7.3
2.20.9-0ubuntu7.4
2.20.9-0ubuntu7.5
2.20.9-0ubuntu7.6
2.20.9-0ubuntu7.7
2.20.9-0ubuntu7.8
2.20.9-0ubuntu7.9
2.20.9-0ubuntu7.11
2.20.9-0ubuntu7.12
2.20.9-0ubuntu7.13

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "apport"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "apport-gtk"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "apport-kde"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "apport-noui"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "apport-retrace"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "apport-valgrind"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "dh-apport"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "python-apport"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "python-problem-report"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "python3-apport"
        },
        {
            "binary_version": "2.20.9-0ubuntu7.14",
            "binary_name": "python3-problem-report"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8833.json"

Ubuntu:20.04:LTS / apport

Package

Name
apport
Purl
pkg:deb/ubuntu/apport@2.20.11-0ubuntu22?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.20.11-0ubuntu22

Affected versions

2.*
2.20.11-0ubuntu8
2.20.11-0ubuntu9
2.20.11-0ubuntu13
2.20.11-0ubuntu14
2.20.11-0ubuntu15
2.20.11-0ubuntu16
2.20.11-0ubuntu17
2.20.11-0ubuntu18
2.20.11-0ubuntu19
2.20.11-0ubuntu20
2.20.11-0ubuntu21

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "apport"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "apport-gtk"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "apport-kde"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "apport-noui"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "apport-retrace"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "apport-valgrind"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "dh-apport"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "python3-apport"
        },
        {
            "binary_version": "2.20.11-0ubuntu22",
            "binary_name": "python3-problem-report"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8833.json"