cve/2015/CVE-2015-5600.md

### [CVE-2015-5600](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5600)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.

### POC

#### Reference
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/91787
- https://security.netapp.com/advisory/ntap-20151106-0001/

#### Github
- https://github.com/Live-Hack-CVE/CVE-2015-5600
- https://github.com/ahm3dhany/IDS-Evasion
- https://github.com/pboonman196/Final_Project_CyberBootcamp
- https://github.com/scmanjarrez/CVEScannerV2
- https://github.com/sjourdan/clair-lab
- https://github.com/vshaliii/DC-1-Vulnhub-Walkthrough
- https://github.com/vshaliii/DC-2-Vulnhub-Walkthrough