Information disclosure in Linux kernel if F5 BIG-IP products

1) Use of insufficiently random values

EUVDB-ID: #VU49150

Risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-25705

CWE-ID: CWE-330 - Use of Insufficiently Random Values

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.

Mitigation

Install update from vendor's website.

Vulnerable software versions

BIG-IP APM: 11.6.1 - 13.1.3.5

BIG-IP SSLO: 11.6.1 - 13.1.3.5

BIG-IP DDHD: 11.6.1 - 13.1.3.5

BIG-IP Advanced WAF: 11.6.1 - 13.1.3.5

BIG-IP PEM: 11.6.1 - 13.1.3.5

BIG-IP Link Controller: 11.6.1 - 13.1.3.5

BIG-IP GTM: 11.6.1 - 13.1.3.5

BIG-IP FPS: 11.6.1 - 13.1.3.5

BIG-IP DNS: 11.6.1 - 13.1.3.5

BIG-IP ASM: 11.6.1 - 13.1.3.5

BIG-IP Analytics: 11.6.1 - 13.1.3.5

BIG-IP AFM: 11.6.1 - 13.1.3.5

BIG-IP AAM: 11.6.1 - 13.1.3.5

BIG-IP LTM: 11.6.1 - 13.1.3.5

BIG-IP: 11.6.1 - 13.1.3.5

BIG-IQ Centralized Management: 5.4.0 - 7.1.0

External links

http://support.f5.com/csp/article/K09604370

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.