CVE-2018-6557
Published: 21 August 2018
The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled.
Notes
| Author | Note |
|---|---|
| mdeslaur | low priority because of default symlink restrictions |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
base-files Launchpad, Ubuntu, Debian |
bionic |
Released
(10.1ubuntu2.2)
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
| This vulnerability is mitigated in part by the use of symlink restrictions in Ubuntu. | ||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.0 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |