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CVE-2018-6557
Insecure temporary file use in base-files
High7.0EPSS 0.37%
- Published
- Updated
- Reserved
- Assigned by
- canonical
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (3 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Weakness
- Insecure Temporary File
- CWE-59 (opens in a new tab)All about CWE-59 and its CVEs
Affected products
- affected unspecified – < 10.1ubuntu2.2
References (3)
- USN-3748-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 1041530 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 105148 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-6557)Record last updated .