#VU36349 Buffer overflow in OpenLiteSpeed - CVE-2018-19792

Vulnerability identifier: #VU36349

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-19792

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
OpenLiteSpeed
Server applications / Web servers

Vendor: LiteSpeed Technologies

Description

The vulnerability allows a local privileged user to execute arbitrary code.

The server in LiteSpeed OpenLiteSpeed before 1.5.0 RC6 allows local users to cause a denial of service (buffer overflow) or possibly have unspecified other impact by creating a symlink through which the openlitespeed program can be invoked with a long command name (involving ../ characters), which is mishandled in the LshttpdMain::getServerRootFromExecutablePath function.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenLiteSpeed: 1.5.0

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External links
https://github.com/litespeedtech/openlitespeed/issues/117

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.