Insecure DLL loading in BIG-IP APM CTU
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-22980 |
| CWE-ID | CWE-427 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
APM Clients Hardware solutions / Security hardware applicances BIG-IP APM Hardware solutions / Security hardware applicances |
| Vendor | F5 Networks |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Insecure DLL loading
EUVDB-ID: #VU50613
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2021-22980
CWE-ID:
CWE-427 - Uncontrolled Search Path Element
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to the Client Troubleshooting Utility on Windows loads DLL libraries in an insecure manner. A remote attacker can place a specially crafted .dll file on a remote SMB fileshare, trick the victim into opening a file, associated with the vulnerable application, and execute arbitrary code on victim's system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsAPM Clients: 7.1.5 - 7.2.1
BIG-IP APM: 11.6.1 HF1 - 16.0.1
CPE2.3- cpe:2.3:h:f5_networks:big-ip_apm_client:7.1.5:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm_client:7.1.6:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm_client:7.1.7:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm:11.6.1:HF1:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm:11.6.2:HF1:*:*:*:*:*:*
https://support.f5.com/csp/article/K29282483
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.
