|Number of vulnerabilities||1|
|CVE ID|| CVE-2020-1967
|CWE ID|| CWE-476
|Public exploit||Public exploit code for vulnerability #1 is available.|
Server applications / Encryption software
|Vendor||OpenSSL Software Foundation|
This security advisory describes one medium risk vulnerability.
CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C] [PCI]
Exploit availability: YesDescription
The 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.Mitigation
Install updates from vendor's website.Vulnerable software versions
OpenSSL: 1.1.1d, 1.1.1e, 1.1.1fCPE
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.