CVE-2021-30465
Published: 19 May 2021
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | 1.0.0-rc94 is also affected |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
runc Launchpad, Ubuntu, Debian |
bionic |
Released
(1.0.0~rc93-0ubuntu1~18.04.2)
|
| focal |
Released
(1.0.0~rc93-0ubuntu1~20.04.2)
|
|
| groovy |
Released
(1.0.0~rc93-0ubuntu1~20.10.2)
|
|
| hirsute |
Released
(1.0.0~rc93-0ubuntu1.1)
|
|
| impish |
Released
(1.0.0~rc93-0ubuntu2)
|
|
| jammy |
Released
(1.0.0~rc93-0ubuntu2)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(1.0.0-rc95)
|
|
| xenial |
Released
(1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2)
Available with Ubuntu Pro |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.5 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |