CVE-2018-6557

Insecure temporary file use in base-files

Description

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.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.12%
Vendor Advisory ubuntu.com
Affected: Ubuntu base-files
Published at:
Updated at:

References

Link Tags
https://usn.ubuntu.com/3748-1/ vendor advisory
http://www.securitytracker.com/id/1041530 broken link third party advisory vdb entry
http://www.securityfocus.com/bid/105148 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2018-6557?
CVE-2018-6557 has been scored as a high severity vulnerability.
How to fix CVE-2018-6557?
To fix CVE-2018-6557, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-6557 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-6557 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-6557?
CVE-2018-6557 affects Ubuntu base-files.
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