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



Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2019-18282
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
BIG-IQ Centralized Management
Server applications / Remote management servers, RDP, SSH

BIG-IP DNS
Hardware solutions / Routers & switches, VoIP, GSM, etc

BIG-IP Link Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc

BIG-IP AAM
Hardware solutions / Routers & switches, VoIP, GSM, etc

BIG-IP SSLO
Hardware solutions / Firmware

BIG-IP DDHD
Hardware solutions / Firmware

BIG-IP
Hardware solutions / Firmware

BIG-IP PEM
Hardware solutions / Security hardware applicances

BIG-IP GTM
Hardware solutions / Security hardware applicances

BIG-IP FPS
Hardware solutions / Security hardware applicances

BIG-IP ASM
Hardware solutions / Security hardware applicances

BIG-IP Analytics
Hardware solutions / Security hardware applicances

BIG-IP AFM
Hardware solutions / Security hardware applicances

BIG-IP LTM
Hardware solutions / Security hardware applicances

BIG-IP APM
Hardware solutions / Security hardware applicances

BIG-IP Advanced WAF
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor F5 Networks

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU51269

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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 HF1 - 16.0.1.1

BIG-IP Link Controller: 11.6.1 HF1 - 16.0.1.1

BIG-IP GTM: 11.6.1 HF1 - 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 HF1 - 16.0.1.1

BIG-IP Analytics: 11.6.1 HF1 - 16.0.1.1

BIG-IP AFM: 11.6.1 HF1 - 16.0.1.1

BIG-IP Advanced WAF: 11.6.1 - 16.0.1.1

BIG-IP AAM: 11.6.1 HF1 - 16.0.1.1

BIG-IP LTM: 11.6.1 HF1 - 16.0.1.1

BIG-IP: 11.6.1 HF1 - 16.0.1.1

BIG-IP APM: 11.6.1 HF1 - 16.0.1.1

CPE2.3 External links

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


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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