CVE-2020-1733
Published: 11 March 2020
A race condition flaw was found in Ansible Engine 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior when running a playbook with an unprivileged become user. When Ansible needs to run a module with become user, the temporary directory is created in /var/tmp. This directory is created with "umask 77 && mkdir -p <dir>"; this operation does not fail if the directory already exists and is owned by another user. An attacker could take advantage to gain control of the become user as the target directory can be retrieved by iterating '/proc/<pid>/cmdline'.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ansible Launchpad, Ubuntu, Debian |
bionic |
Released
(2.5.1+dfsg-1ubuntu0.1+esm1)
Available with Ubuntu Pro |
| eoan |
Ignored
(end of life)
|
|
| focal |
Released
(2.9.6+dfsg-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
|
| groovy |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| hirsute |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| impish |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| jammy |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| kinetic |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| lunar |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| mantic |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| noble |
Not vulnerable
(2.9.7+dfsg-1)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(2.9.7+dfsg-1, 1.7.2+dfsg-2+deb9u3)
|
|
| xenial |
Released
(2.0.0.2-2ubuntu1.3+esm1)
Available with Ubuntu Pro |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.0 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | Required |
| Scope | Changed |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L |