CVE-2016-6515

HIGH

OpenSSH <7.3 - DoS

Title source: llm

Description

The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.

Exploits (4)

exploitdb WORKING POC
by SecPod Research · pythondoslinux
https://www.exploit-db.com/exploits/40888
nomisec WORKING POC 53 stars
by opsxcq · poc
https://github.com/opsxcq/exploit-CVE-2016-6515
nomisec WORKING POC 1 stars
by jptr218 · poc
https://github.com/jptr218/openssh_dos
nomisec WORKING POC
by cved-sources · poc
https://github.com/cved-sources/cve-2016-6515

Scores

CVSS v3 7.5
EPSS 0.8255
EPSS Percentile 99.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-20
Status published
Products (2)
fedoraproject/fedora 24
openbsd/openssh < 7.2
Published Aug 07, 2016
Tracked Since Feb 18, 2026