Authentication bypass in SolarWinds Orion API

1) Improper Authentication

EUVDB-ID: #VU49151

Risk: Critical

CVSSv4.0: 9.3 [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:A/U:Red]

CVE-ID: CVE-2020-10148

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests within the SolarWinds Orion API. If an attacker appends a PathInfo parameter of WebResource.adx, ScriptResource.adx, i18n.ashx, or Skipi18n to a request to a SolarWinds Orion server, SolarWinds may set the SkipAuthorization flag, which may allow the API request to be processed without requiring authentication. This vulnerability could allow a remote non-authenticated attacker to bypass authentication and execute API commands which may result in a compromise of the SolarWinds instance.

Note, this vulnerability is dubbed SUPERNOVA and is being exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Orion Platform: 2016.1 - 2020.2.1 HF 1

CPE2.3

• cpe:2.3:a:solarwinds:orion_platform:2016.1:*:*:*:*:*:*:*
• cpe:2.3:a:solarwinds:orion_platform:2016.2:*:*:*:*:*:*:*
• cpe:2.3:a:solarwinds:orion_platform:2017.1:*:*:*:*:*:*:*

External links

https://www.kb.cert.org/vuls/id/843464
https://www.solarwinds.com/securityadvisory

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.