#VU1033 Denial of service in OpenSSH - CVE-2016-8858
Published: October 21, 2016 / Updated: December 19, 2016
Vulnerability identifier: #VU1033
Vulnerability risk: Medium
CVSSv4.0: 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-2016-8858
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenSSH
OpenSSH
Software vendor:
OpenSSH
OpenSSH
Description
The vulnerability allows a remote unauthenticated attacker to cause DoS conditions on the target system.
The weakness is due to flaw in kex_input_kexinit() function. By sending a specially crafted data during the key exchange process, attackers can cause memory exhaustion. Consuming up to 128 MB per connection may lead to denial of service.
Successful exploitation of the vulnerability results in denial of service of the vulnerable system.
The weakness is due to flaw in kex_input_kexinit() function. By sending a specially crafted data during the key exchange process, attackers can cause memory exhaustion. Consuming up to 128 MB per connection may lead to denial of service.
Successful exploitation of the vulnerability results in denial of service of the vulnerable system.
Remediation
Install the latest OpenSSH version 7.4.