Lucene search

[email protected]CVE-2018-6557

HistoryAug 21, 2018 - 4:29 p.m.

CVE-2018-6557

2018-08-2116:29:00

CWE-59

[email protected]

web.nvd.nist.gov

cve

2018

6557

motd

base-files package

ubuntu

denial of service

privilege escalation

kernel symlink restrictions

4.4 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

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.

Affected configurations

NVD

Node

base-files_projectbase-filesMatch10.1ubuntu2.2

canonicalubuntu_linuxMatch18.04lts

canonicalubuntu_linuxMatch18.10

CPENameOperatorVersion
base-files_project:base-filesbase-files project base-fileseq10.1ubuntu2.2
canonical:ubuntu_linuxcanonical ubuntu linuxeq18.04
canonical:ubuntu_linuxcanonical ubuntu linuxeq18.10

CPE	Name	Operator	Version
base-files_project:base-files	base-files project base-files	eq	10.1ubuntu2.2
canonical:ubuntu_linux	canonical ubuntu linux	eq	18.04
canonical:ubuntu_linux	canonical ubuntu linux	eq	18.10

CNA Affected

[
  {
    "product": "base-files",
    "vendor": "Ubuntu",
    "versions": [
      {
        "lessThan": "10.1ubuntu2.2",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]