CVE-2020-8445
highpriority · track · 40EPSS 0.023 · 83 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 9–10
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (15)
External citations — patches, advisories, analysis.
- https://github.com/ossec/ossec-hids/issues/1814cnnvd
- https://github.com/ossec/ossec-hids/issues/1821cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-8445cnnvd
- https://packetstormsecurity.com/files/158598/Gentoo-Linux-Security-Advisory-202007-33.htmlcnnvd
- https://security.gentoo.org/glsa/202007-33cnnvd
- https://vigilance.fr/vulnerability/OSSEC-HIDS-multiple-vulnerabilities-31465cnnvd
- https://www.ossec.net/cnnvd
- https://github.com/ossec/ossec-hids/issues/1814enisa_euvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan