HTTP/2 Settings Flood vulnerability in F5 Networks BIG-IP (LTM)



Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2019-9515
CWE-ID CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
 BIG-IP LTM
Hardware solutions / Security hardware applicances

Vendor F5 Networks

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource management error

EUVDB-ID: #VU20337

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-9515

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in HTTP/2 implementation when processing SETTINGS frames. A remote attacker can send a huge amount of  SETTINGS frames to the peer and consume excessive CPU and memory on the system.

Mitigation

Vulnerability is present in virtual servers configured to use the HTTP/2 profile.

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

Vulnerable software versions

BIG-IP LTM: 15.0.0 - 15.0.1

CPE2.3 External links

http://api-u.f5.com/support/kb-articles/K50233772?cacheFlag=false


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.



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