CVE-2020-8445

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 v3.0 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://www.ossec.net/	Vendor Advisory
https://github.com/ossec/ossec-hids/issues/1814	Third Party Advisory
https://github.com/ossec/ossec-hids/issues/1821	Third Party Advisory
https://security.gentoo.org/glsa/202007-33	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:ossec:ossec:*:*:*:*:*:*:*:*

Information

Published : 2020-01-29 17:15

Updated : 2022-09-12 11:42

NVD link : CVE-2020-8445

Mitre link : CVE-2020-8445

JSON object : View

CWE

CWE-20

Improper Input Validation

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Products Affected

ossec

ossec

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