CVE-2018-6557

HIGH 7.0CVE-2018-6557 · Published 21/08/2018 · updated 17/06/2026

In short

CVE-2018-6557 is a HIGH (CVSS 7.0) vulnerability affecting base-files (base-files project).
Chance of exploitation in the next 30 days (EPSS): 0.37%, higher than 31.4% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
base-files base-files_project	`= 10.1ubuntu2.2`	No fix yet

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.

References

securityfocus.com/bid/105148 · Third Party Advisory
securitytracker.com/id/1041530 · Broken Link
usn.ubuntu.com/3748-1 · Vendor Advisory

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