UBUNTU-CVE-2021-30465

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Source
https://ubuntu.com/security/CVE-2021-30465
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-30465.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-30465
Upstream
Downstream
Related
Published
2021-05-19T10:00:00Z
Modified
2025-07-16T08:26:21.453136Z
Severity
  • 8.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.

References

Affected packages

Ubuntu:Pro:16.04:LTS / runc

Package

Name
runc
Purl
pkg:deb/ubuntu/runc@1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2

Affected versions

0.*

0.0.8+dfsg-2
0.1.1-0ubuntu5~16.04

1.*

1.0.0~rc1-0ubuntu1~16.04
1.0.0~rc1-0ubuntu2~16.04.1
1.0.0~rc1-0ubuntu2~16.04.1.1
1.0.0~rc2-0ubuntu2~16.04.1
1.0.0~rc2+docker1.12.6-0ubuntu1~16.04.1
1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.1
1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.2
1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.3
1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4
1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2"
        },
        {
            "binary_name": "runc",
            "binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2"
        },
        {
            "binary_name": "runc-dbgsym",
            "binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2"
        }
    ]
}

Ubuntu:18.04:LTS / runc

Package

Name
runc
Purl
pkg:deb/ubuntu/runc@1.0.0~rc93-0ubuntu1~18.04.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.0.0~rc93-0ubuntu1~18.04.2

Affected versions

1.*

1.0.0~rc2+docker1.13.1-0ubuntu1
1.0.0~rc4+dfsg1-2
1.0.0~rc4+dfsg1-6
1.0.0~rc4+dfsg1-6ubuntu0.18.04.1
1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.1
1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2
1.0.0~rc10-0ubuntu1~18.04.1
1.0.0~rc10-0ubuntu1~18.04.2
1.0.0~rc93-0ubuntu1~18.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.0.0~rc93-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "runc",
            "binary_version": "1.0.0~rc93-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "runc-dbgsym",
            "binary_version": "1.0.0~rc93-0ubuntu1~18.04.2"
        }
    ]
}

Ubuntu:20.04:LTS / runc

Package

Name
runc
Purl
pkg:deb/ubuntu/runc@1.0.0~rc93-0ubuntu1~20.04.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.0.0~rc93-0ubuntu1~20.04.2

Affected versions

1.*

1.0.0~rc8+git20190923.3e425f80-0ubuntu1
1.0.0~rc10-0ubuntu1
1.0.0~rc93-0ubuntu1~20.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.0.0~rc93-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "runc",
            "binary_version": "1.0.0~rc93-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "runc-dbgsym",
            "binary_version": "1.0.0~rc93-0ubuntu1~20.04.2"
        }
    ]
}