System tracking vulnerability in Linux kernel in F5 BIP-IP products



Published: 2021-03-09

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU51269

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2019-18282

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to track devices via UDP packets.

The vulnerability exists due to excessive data output in the flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 and affects net/core/flow_dissector.c and related code. The auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. A remote attacker can use the hashrnd value and track reliably track activity of devices using UDP packets.

Mitigation

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

Vulnerable software versions

BIG-IQ Centralized Management: 8.0.0

BIG-IP DNS: 11.6.1 - 16.0.1.1

BIG-IP SSLO: 11.6.1 - 16.0.1.1

BIG-IP PEM: 11.6.1 - 16.0.1.1

BIG-IP Link Controller: 11.6.1 - 16.0.1.1

BIG-IP GTM: 11.6.1 - 16.0.1.1

BIG-IP FPS: 11.6.1 - 16.0.1.1

BIG-IP DDHD: 11.6.1 - 16.0.1.1

BIG-IP ASM: 11.6.1 - 16.0.1.1

BIG-IP Analytics: 11.6.1 - 16.0.1.1

BIG-IP AFM: 11.6.1 - 16.0.1.1

BIG-IP Advanced WAF: 11.6.1 - 16.0.1.1

BIG-IP AAM: 11.6.1 - 16.0.1.1

BIG-IP LTM: 11.6.1 - 16.0.1.1

BIG-IP: 11.6.1 - 16.0.1.1

BIG-IP APM: 11.6.1 - 16.0.1.1


CPE2.3 External links

http://support.f5.com/csp/article/K32380005

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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