Multiple vulnerabilities in NGINX Controller



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-5864
CVE-2020-5863
CWE-ID CWE-295
CWE-285
Exploitation vector Network
Public exploit N/A
Vulnerable software
 NGINX Controller
Server applications / Web servers

Vendor F5 Networks

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Certificate Validation

EUVDB-ID: #VU27300

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-5864

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists due to communication between NGINX Controller and NGINX Plus instances skip TLS verification by default. A remote attacker can perform a MitM attack and read/modify data in transit.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NGINX Controller: 1.0.1 - 3.1.0

CPE2.3 External links

https://support.f5.com/csp/article/K27205552


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?

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

2) Improper Authorization

EUVDB-ID: #VU26263

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-5863

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to NGINX Controller allows a remote unauthenticated attacker to create unprivileged user accounts and upload a new license to the system. A remote attacker can use this behavior to consume all available disk space on the system and perform a denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NGINX Controller: 1.0.1 - 3.1.0

CPE2.3 External links

https://api-u.f5.com/support/kb-articles/K14631834?cacheFlag=false


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?

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



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