#VU11392 Memory leak in F5 Networks products - CVE-2018-5500

Vulnerability identifier: #VU11392

Vulnerability risk: Low

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

CVE-ID: CVE-2018-5500

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
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 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 Edge Gateway
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP Link Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP WebAccelerator
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP WebSafe
Server applications / Server solutions for antivurus protection

Vendor: F5 Networks

Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists due to memory leak when establishing a Multipath TCP (MCTCP) connection. A remote attacker who is able to establish an MCTCP connection can consume excessive amounts of memory resources and cause the service to crash.

Mitigation
Update to versions 13.1.0, 12.1.3.2 or 11.6.3.

Vulnerable software versions

BIG-IP LTM: 11.6.1 - 13.0.0

BIG-IP AAM: 11.6.1 - 13.0.0

BIG-IP AFM: 11.6.1 - 13.0.0

BIG-IP Analytics: 11.6.1 - 13.0.0

BIG-IP APM: 11.6.1 - 13.0.0

BIG-IP ASM: 11.6.1 - 13.0.0

BIG-IP DNS: 11.6.1 - 13.0.0

BIG-IP Edge Gateway: 11.6.1 - 13.0.0

BIG-IP GTM: 11.6.1 - 13.0.0

BIG-IP Link Controller: 11.6.1 - 13.0.0

BIG-IP PEM: 11.6.1 - 13.0.0

BIG-IP WebAccelerator: 11.6.1 - 13.0.0

BIG-IP WebSafe: 11.6.1 - 13.0.0

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External links
https://support.f5.com/csp/article/K33211839

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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.