Improper input validation in Go used by fsm and cert-manager in BIG-IP Next SPK/CNF

1) Input validation error

EUVDB-ID: #VU81964

Risk: Medium

CVSSv4.0: 4.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-39323

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input when processing line directives (e.g. "//line") in the code. A remote attacker can bypass restrictions on "//go:cgo_" directives, allowing blocked linker and compiler flags to be passed during compilation. This can result in unexpected execution of arbitrary code when running "go build".

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BIG-IP Next CNF: 1.1.0 - 2.0.1

BIG-IP Next SPK: 1.7.0 - 2.0.1

CPE2.3

• cpe:2.3:o:f5_networks:big-ip_next_cnf:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:o:f5_networks:big-ip_next_cnf:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:f5_networks:big-ip_next_cnf:1.2.0:*:*:*:*:*:*:*
• cpe:2.3:o:f5_networks:big-ip_next_spk:1.7.0:*:*:*:*:*:*:*
• cpe:2.3:o:f5_networks:big-ip_next_spk:1.7.1:*:*:*:*:*:*:*
• cpe:2.3:o:f5_networks:big-ip_next_spk:1.7.2:*:*:*:*:*:*:*

External links

https://my.f5.com/manage/s/article/K000152607

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.