Nessus Network Monitor update for OpenSSL
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-1967 |
| CWE-ID | CWE-476 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
Nessus Network Monitor Client/Desktop applications / Software for system administration |
| Vendor | Tenable Network Security |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) NULL pointer dereference
EUVDB-ID: #VU27061
Risk: Medium
CVSSv4.0: 7.7 [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:P/U:Green]
CVE-ID: CVE-2020-1967
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 within the SSL_check_chain() function during or after a TLS 1.3 handshake. A remote attacker can send an invalid or unrecognised signature algorithm and perform a denial of service (DoS) attack.
MitigationUpdate to version 5.11.1.
Nessus Network Monitor: 5.0 - 5.11.0
CPE2.3- cpe:2.3:a:tenable_network_security:nessus_network_monitor:5.0:*:*:*:*:*:*:*
- cpe:2.3:a:tenable_network_security:nessus_network_monitor:5.1:*:*:*:*:*:*:*
- cpe:2.3:a:tenable_network_security:nessus_network_monitor:5.2:*:*:*:*:*:*:*
https://www.tenable.com/security/tns-2020-04
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.
