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CVE-2018-6557: base-files_project base-files Link Following

CVSS: 7.0v3.1HighModified
AliasesUBUNTU-CVE-2018-6557USN-3748-1
Published 21-08-2018Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2018-6557 is a high (CVSS 7.0) Link Following vulnerability in base-files_project base-files. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.8% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v3.1 (NVD)
EPSS score
0.36%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-08-2018
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

0.00 pp

From 0.36% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.36%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • base-files< 10.1ubuntu2.2
  • base-files≥ unspecified, < 10.1ubuntu2.2
Base-files_project1 product
Canonical1 product

3 vendors · 4 products

References

7 links