CVE-2018-6557 — HIGH (7.0) — White Hats Nepal

Vulnerability 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.

CVSS Score

7.0

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Base-Files Project	Base-Files	10.1ubuntu2.2
Canonical	Ubuntu Linux	18.04

Related Weaknesses (CWE)

CWE-59

References

http://www.securityfocus.com/bid/105148Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041530Broken LinkThird Party AdvisoryVDB Entry
https://usn.ubuntu.com/3748-1/Vendor Advisory
http://www.securityfocus.com/bid/105148Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041530Broken LinkThird Party AdvisoryVDB Entry
https://usn.ubuntu.com/3748-1/Vendor Advisory

FAQ

What is CVE-2018-6557?

CVE-2018-6557 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 issu...

How severe is CVE-2018-6557?

CVE-2018-6557 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-6557?

Check the references section above for vendor advisories and patch information. Affected products include: Base-Files Project Base-Files, Canonical Ubuntu Linux.