CVE-2016-3116

DropBearSSHD 2015.71 - Command Injection

Severity Score

6.4

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

CRLF injection vulnerability in Dropbear SSH before 2016.72 allows remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data.

Vulnerabilidad de inyección CRLF en Dropbear SSH en versiones anteriores a 2016.72 permite a usuarios remotos autenticados eludir las restricciones de comandos de shell previstas a través del redireccionamiento de datos X11 manipulados.

Dropbear sshd versions 2015.71 and below suffer from a command injection vulnerability via xauth. An authenticated user may inject arbitrary xauth commands by sending an x11 channel request that includes a newline character in the x11 cookie. The newline acts as a command separator to the xauth binary. This attack requires the server to have 'X11Forwarding yes' enabled. Disabling it, mitigates this vector.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-03-03 First Exploit
2016-03-10 CVE Reserved
2016-03-15 CVE Published
2023-11-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (12)

URL	Tag	Source
http://packetstormsecurity.com/files/136251/Dropbear-SSHD-xauth-Command-Injection-Bypass.html	X_refsource_misc
http://seclists.org/fulldisclosure/2016/Mar/47	Mailing List
https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115	X_refsource_misc
https://matt.ucc.asn.au/dropbear/CHANGES	X_refsource_confirm

URL	Date	SRC
https://www.exploit-db.com/exploits/40119	2016-03-03
https://github.com/mxypoo/CVE-2016-3116-DropbearSSH	2022-02-22

URL	Date	SRC

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179261.html	2016-12-03
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179269.html	2016-12-03
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179870.html	2016-12-03
http://lists.opensuse.org/opensuse-updates/2016-03/msg00105.html	2016-12-03
http://lists.opensuse.org/opensuse-updates/2016-03/msg00113.html	2016-12-03
https://security.gentoo.org/glsa/201607-08	2016-12-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Dropbear Ssh Project Search vendor "Dropbear Ssh Project"		Dropbear Ssh Search vendor "Dropbear Ssh Project" for product "Dropbear Ssh"				<= 2015.71 Search vendor "Dropbear Ssh Project" for product "Dropbear Ssh" and version " <= 2015.71"		-		Affected