Vulnerability identifier: #VU14163
Vulnerability risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-476
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
OpenSSH
Server applications /
Remote management servers, RDP, SSH
Vendor: OpenSSH
Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to improper processing of out-of-sequence NEWKEYS messages, as defined in the kex.c and packet.c source code files. A remote attacker can send an out-of-sequence NEWKEYS message, trigger a NULL pointer dereference condition and cause the sshd daemon to crash.
Mitigation
Update to version 7.4.
Vulnerable software versions
OpenSSH: 6.0p1 - 7.3p1
External links
http://www.openssh.com/releasenotes.html
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.