OpenSSL vulnerability in multiple F5 products
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-1971 |
| CWE-ID | CWE-476 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
APM Clients Hardware solutions / Security hardware applicances 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 Traffix SDC Client/Desktop applications / Software for system administration 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 Hardware solutions / Firmware BIG-IP SSLO Hardware solutions / Firmware BIG-IP DDHD Hardware solutions / Firmware BIG-IP Advanced WAF Client/Desktop applications / Antivirus software/Personal firewalls BIG-IQ Centralized Management Server applications / Remote management servers, RDP, SSH |
| Vendor | F5 Networks |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) NULL pointer dereference
EUVDB-ID: #VU48896
Risk: Medium
CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]
CVE-ID: CVE-2020-1971
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via the API functions TS_RESP_verify_response and TS_RESP_verify_token). If an attacker can control both items being compared then that attacker could trigger a crash. For example if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then this may occur. Note that some applications automatically download CRLs based on a URL embedded in a certificate. This checking happens prior to the signatures on the certificate and CRL being verified. OpenSSL's s_server, s_client and verify tools have support for the "-crl_download" option which implements automatic CRL downloading and this attack has been demonstrated to work against those tools. Note that an unrelated bug means that affected versions of OpenSSL cannot parse or construct correct encodings of EDIPARTYNAME. However it is possible to construct a malformed EDIPARTYNAME that OpenSSL's parser will accept and hence trigger this attack.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
APM Clients: 7.1.5 - 7.2.1
Traffix SDC: 5.1.0 CF 19 - 5.1.0
BIG-IP PEM: 12.1.0 HF1 - 16.0.1.1
BIG-IP Link Controller: 12.1.0 HF1 - 16.0.1.1
BIG-IP GTM: 12.1.0 - 16.0.1.1
BIG-IP FPS: 12.1.0 - 16.0.1.1
BIG-IP DNS: 12.1.0 - 16.0.1.1
BIG-IP ASM: 12.1.0 HF1 - 16.0.1.1
BIG-IP APM: 12.1.0 HF1 - 16.0.1.1
BIG-IP Analytics: 12.1.0 - 16.0.1.1
BIG-IP AFM: 12.1.0 HF1 - 16.0.1.1
BIG-IP AAM: 12.1.0 HF1 - 16.0.1.1
BIG-IP LTM: 12.1.0 HF1 - 16.0.1.1
BIG-IP: 12.1.0 HF1 - 16.0.1.1
BIG-IP SSLO: 12.1.0 - 16.0.1
BIG-IP DDHD: 12.1.0 - 16.0.1
BIG-IP Advanced WAF: 12.1.0 - 16.0.1
BIG-IQ Centralized Management: 6.0.0 - 7.1.0
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:a:f5_networks:traffix_sdc:5.1.0:CF 19:*:*:*:*:*:*
- cpe:2.3:a:f5_networks:traffix_sdc:5.1.0:CF 22:*:*:*:*:*:*
- cpe:2.3:a:f5_networks:traffix_sdc:5.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:12.1.0 HF1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:12.1.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:12.1.0 HF1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_gtm:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_fps:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_dns:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_asm:12.1.0 HF1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm:12.1.0:HF1:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_analytics:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_afm:12.1.0:HF1:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_aam:12.1.0:HF1:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ltm:12.1.0 HF1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip:12.1.5.2:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_sslo:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ddhd:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:f5_networks:big-ip_advanced_waf:12.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:f5_networks:big-iq:6.0.0:*:*:*:*:*:*:*
https://support.f5.com/csp/article/K42910051
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. However, proof of concept for this vulnerability is available.
