Vulnerability identifier: #VU46074

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5926

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BIG-IP
Hardware solutions / Firmware
BIG-IP LTM
Hardware solutions / Security hardware applicances
BIG-IP AFM
Hardware solutions / Security hardware applicances
BIG-IP Analytics
Hardware solutions / Security hardware applicances
BIG-IP APM
Hardware solutions / Security hardware applicances
BIG-IP ASM
Hardware solutions / Security hardware applicances
BIG-IP FPS
Hardware solutions / Security hardware applicances
BIG-IP GTM
Hardware solutions / Security hardware applicances
BIG-IP PEM
Hardware solutions / Security hardware applicances
BIG-IP AAM
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP DNS
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP Link Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: F5 Networks

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in Virtual server using the SIP ALG profile. A remote attacker can send specially crafted SIP messages that contain a multi-part MIME payload and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 14.1.0 - 14.1.2, 15.1.0, 15.0.0 - 15.0.1

BIG-IP LTM: 14.1.0 - 15.1.0

BIG-IP AAM: 14.1.0 - 15.1.0

BIG-IP AFM: 14.1.0 - 15.1.0

BIG-IP Analytics: 14.1.0 - 15.1.0

BIG-IP APM: 14.1.0 - 15.1.0

BIG-IP ASM: 14.1.0 - 15.1.0

BIG-IP DNS: 14.1.0 - 15.1.0

BIG-IP FPS: 14.1.0 - 15.1.0

BIG-IP GTM: 14.1.0 - 15.1.0

BIG-IP Link Controller: 14.1.0 - 15.1.0

BIG-IP PEM: 14.1.0 - 15.1.0

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External links
http://support.f5.com/csp/article/K42830212

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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.