Memory leak in F5 Networks products - CVE-2020-27725
Published: December 17, 2020
Vulnerability identifier: #VU49068
CSH Severity: Low
CVSS v4: 5.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-27725
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform DoS attack on the target system.
The vulnerability exists due memory leak in zxfrd process when listing DNS zones. A remote user with access to TMSH, iControl or SNMP can force the application to leak memory and perform denial of service attack.
This vulnerability affects only BIG-IP systems that are provisioned with BIG-IP DNS or BIG-IP GTM and at least one DNS zone.
Affected software
BIG-IP GTM
BIG-IP Link Controller
BIG-IP DNS
BIG-IP Link Controller
BIG-IP DNS
How to mitigate CVE-2020-27725
Install updates from vendor's website.
BIG-IP GTM - addressed in versions 13.1.3.5, 14.1.3.1, 15.1.1
BIG-IP Link Controller - addressed in versions 13.1.3.5, 14.1.3.1, 15.1.1
BIG-IP DNS - addressed in versions 13.1.3.5, 14.1.3.1, 15.1.1
BIG-IP Link Controller - addressed in versions 13.1.3.5, 14.1.3.1, 15.1.1
BIG-IP DNS - addressed in versions 13.1.3.5, 14.1.3.1, 15.1.1