CVE-2020-8445 Information

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.

CVSS Vector

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

Reference

https://github.com/ossec/ossec-hids/issues/1814 https://github.com/ossec/ossec-hids/issues/1821 https://security.gentoo.org/glsa/202007-33 https://www.ossec.net/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8