Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU51269
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-18282
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe 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.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
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
External linkshttp://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.