Security restrictions bypass in Linux kernel in F5 Netwroks BIG-IP
| Risk | Low |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-18397 |
| CWE-ID | CWE-264 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
BIG-IP SSLO Hardware solutions / Firmware BIG-IP DDHD Hardware solutions / Firmware BIG-IP Hardware solutions / Firmware BIG-IP PEM Hardware solutions / Security hardware applicances BIG-IP GTM Hardware solutions / Security hardware applicances BIG-IP FPS Hardware solutions / Security hardware applicances BIG-IP ASM Hardware solutions / Security hardware applicances BIG-IP APM Hardware solutions / Security hardware applicances BIG-IP Analytics Hardware solutions / Security hardware applicances BIG-IP AFM Hardware solutions / Security hardware applicances BIG-IP LTM Hardware solutions / Security hardware applicances BIG-IP Link Controller Hardware solutions / Routers & switches, VoIP, GSM, etc BIG-IP DNS Hardware solutions / Routers & switches, VoIP, GSM, etc BIG-IP AAM Hardware solutions / Routers & switches, VoIP, GSM, etc BIG-IP Advanced WAF Client/Desktop applications / Antivirus software/Personal firewalls |
| Vendor | F5 Networks |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Security restrictions bypass
EUVDB-ID: #VU16558
Risk: Low
CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2018-18397
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to bypass security restrictions on the target system.
The vulnerability exists due to improper access control in the userfaultfd implementation. A local attacker can access a system that is mounted with shmem or hugetlbs virtual memory areas, maliciously modify mapping to targeted files and write arbitrary memory on the system, which could be used to conduct additional attacks.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsBIG-IP SSLO: 13.1.0 - 16.0.1
BIG-IP PEM: 13.1.0 - 16.0.1
BIG-IP Link Controller: 13.1.0 - 16.0.1
BIG-IP GTM: 13.1.0 - 16.0.1
BIG-IP FPS: 13.1.0 - 16.0.1
BIG-IP DNS: 13.1.0 - 16.0.1
BIG-IP DDHD: 13.1.0 - 16.0.1
BIG-IP ASM: 13.1.0 - 16.0.1
BIG-IP APM: 13.1.0 - 16.0.1
BIG-IP Analytics: 13.1.0 - 16.0.1
BIG-IP AFM: 13.1.0 - 16.0.1
BIG-IP Advanced WAF: 13.1.0 - 16.0.1
BIG-IP AAM: 13.1.0 - 16.0.1
BIG-IP LTM: 13.1.0 - 16.0.1
BIG-IP: 13.1.0 - 16.0.1
CPE2.3- cpe:2.3:h:f5_networks:big-ip_sslo:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_sslo:13.1.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_sslo:13.1.3:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:13.1.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:13.1.0.2:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:13.1.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:13.1.0.2:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_gtm:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_fps:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_dns:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ddhd:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_asm:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_analytics:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_afm:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:f5_networks:big-ip_advanced_waf:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_aam:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ltm:13.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip:13.1.3.4:*:*:*:*:*:*:*
https://support.f5.com/csp/article/K83102920
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
