#VU49209 Improper Authentication in InfluxDB - CVE-2019-20933

Vulnerability identifier: #VU49209

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2019-20933

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
InfluxDB
Server applications / Database software

Vendor: InfluxData

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due the JWT token may have an empty SharedSecret in the authenticate function in services/httpd/handler.go. A remote non-authenticated attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

InfluxDB: 1.7.0 - 1.7.5

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External links
https://github.com/influxdata/influxdb/commit/761b557315ff9c1642cf3b0e5797cd3d983a24c0
https://github.com/influxdata/influxdb/compare/v1.7.5...v1.7.6
https://github.com/influxdata/influxdb/issues/12927
https://lists.debian.org/debian-lts-announce/2020/12/msg00030.html

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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. However, proof of concept for this vulnerability is available.