#VU30453 Input validation error in OpenLiteSpeed - CVE-2020-5519

Vulnerability identifier: #VU30453

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-5519

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenLiteSpeed
Server applications / Web servers

Vendor: LiteSpeed Technologies

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The WebAdmin Console in OpenLiteSpeed before v1.6.5 does not strictly check request URLs, as demonstrated by the "Server Configuration > External App" screen.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenLiteSpeed: 1.6.0 - 1.6.4

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External links
https://drive.google.com/open?id=1pSciFEfjHp3kN8y5shy_zosJo7dje_fX
https://forum.openlitespeed.org/threads/openlitespeed-v1-6-5-now-available.4047/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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