Vulnerability in Base-Files Project
CVE-2018-6557
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.
EPSS: 0.004 (29.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Base-files_project Base-files — versions 10.1ubuntu2.2
- Canonical Ubuntu_linux — versions 18.04, 18.10
- Ubuntu Base-files — versions unspecified
Weakness classification (CWE)
References
- security@ubuntu.com (x_refsource_UBUNTU, vendor-advisory, Vendor Advisory)
- security@ubuntu.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK, Broken Link)
- security@ubuntu.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2018-6557?
- CVE-2018-6557 is a high-severity vulnerability in Base-Files Project, classified under Improper Link Resolution Before File Access. CVSS score: 7.0/10. Published 2018-08-21.
- How severe is CVE-2018-6557?
- High severity. CVSS v3 base score is 7.0 out of 10.