Vulnerability · Published Jan 30, 2020 · Assigned by mitre
CVE-2020-8445
Critical 9.8
In plain English
A critical-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities).
Official 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.
Affected products (as reported)
References
- https://github.com/ossec/ossec-hids/issues/1821 x_refsource_MISC
- https://www.ossec.net/ x_refsource_MISC
- https://github.com/ossec/ossec-hids/issues/1814 x_refsource_MISC
- GLSA-202007-33 vendor-advisory, x_refsource_GENTOO