Denial of service in BIG-IP glibc implementation
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-3326 |
| CWE-ID | CWE-617 |
| Exploitation vector | Network |
| Public exploit | N/A |
| 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 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 ASM 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 medium risk vulnerability.
1) Reachable Assertion
EUVDB-ID: #VU50075
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-2021-3326
CWE-ID:
CWE-617 - Reachable Assertion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion within the iconv function in the GNU C Library (aka glibc or libc6) when processing invalid input sequences in the ISO-2022-JP-3 encoding. A remote attacker can pass specially crafted data to the application, trigger an assertion failure and crash the affected application.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
BIG-IP SSLO: 11.6.1 - 13.1.3.6
BIG-IP PEM: 11.6.1 - 13.1.3.6
BIG-IP Link Controller: 11.6.1 - 13.1.3.6
BIG-IP GTM: 11.6.1 - 13.1.3.6
BIG-IP FPS: 11.6.1 - 13.1.3.6
BIG-IP DNS: 11.6.1 - 13.1.3.6
BIG-IP DDHD: 11.6.1 - 13.1.3.6
BIG-IP APM: 11.6.1 - 13.1.3.6
BIG-IP Analytics: 11.6.1 - 13.1.3.6
BIG-IP AFM: 11.6.1 - 13.1.3.6
BIG-IP Advanced WAF: 11.6.1 - 13.1.3.6
BIG-IP AAM: 11.6.1 - 13.1.3.6
BIG-IP LTM: 11.6.1 - 13.1.3.6
BIG-IP: 11.6.1 - 13.1.3.6
BIG-IP ASM: 11.6.1 - 13.1.3.6
CPE2.3- cpe:2.3:h:f5_networks:big-ip_sslo:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_sslo:11.6.2:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_sslo:11.6.2 HF1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:11.6.1 HF1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:11.6.2:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:11.6.1 HF1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:11.6.2:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_gtm:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_fps:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_dns:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ddhd:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_analytics:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_afm:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:a:f5_networks:big-ip_advanced_waf:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_aam:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ltm:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip:11.6.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_asm:11.6.1:*:*:*:*:*:*:*
https://support.f5.com/csp/article/K44945790
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.
