CVE-2020-8445

Published Jan 30, 2020

Last updated 2 years ago

Overview

Description: In OSSEC-HIDS 2.7 through 3.5.0, the OS_CleanMSG function in ossec-analysisd doesn't remove or encode terminal control characters or newlines from processed log messages. In many cases, those characters are later logged. Because newlines (\n) are permitted in messages processed by ossec-analysisd, it may be possible to inject nested events into the ossec log. Use of terminal control characters may allow obfuscating events or executing commands when viewed through vulnerable terminal emulators. This may be an unauthenticated remote attack for certain types and origins of logged data.
Source: cve@mitre.org
NVD status: Analyzed

Hype score: Not currently trending

Risk scores

CVSS 3.1

Type: Primary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

CVSS 2.0

Type: Primary
Base score: 10
Impact score: 10
Exploitability score: 10
Vector string: AV:N/AC:L/Au:N/C:C/I:C/A:C

Weaknesses

nvd@nist.gov: CWE-20

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:ossec:ossec:*:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "B349E3E6-F70E-41A0-843D-202A82473ABD",
            "versionEndIncluding": "3.5.0",
            "versionStartIncluding": "2.7"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

Overview

Social media

Risk scores

CVSS 3.1

CVSS 2.0

Weaknesses

Configurations

References