Improper input validation in F5 Networks products - CVE-2017-6138
Published: December 25, 2017
Vulnerability identifier: #VU9743
CSH Severity: Low
CVSS v4: 8.7 [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]
CVE-ID: CVE-2017-6138
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists on the systems with BIG-IP APM profiles and the systems with the non-default "normalize URI" configuration options used in iRules and/or BIG-IP LTM policies due to insufficient validation of user-supplied input. A remote attacker can send specially crafted requests to a target virtual server that has an HTTP profile, trigger an unspecified flaw and cause the Traffic Management Microkernel (TMM) to restart and traffic to disrupt.
Successful exploitation of the vulnerability results in denial of service.
Affected software
BIG-IP Link Controller
BIG-IP DNS
BIG-IP AAM
BIG-IP ASM
BIG-IP GTM
BIG-IP APM
BIG-IP Analytics
BIG-IP AFM
BIG-IP PEM
BIG-IP LTM
BIG-IP WebSafe
BIG-IP DNS
BIG-IP AAM
BIG-IP ASM
BIG-IP GTM
BIG-IP APM
BIG-IP Analytics
BIG-IP AFM
BIG-IP PEM
BIG-IP LTM
BIG-IP WebSafe
How to mitigate CVE-2017-6138
The vulnerability is addressed in the following versions: 12.1.3, 13.1.0.