// For flags

CVE-2016-3115

OpenSSH 7.2p1 - (Authenticated) xauth Command Injection

Severity Score

6.4
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

2
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before 7.2p2 allow remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data, related to the (1) do_authenticated1 and (2) session_x11_req functions.

Múltiples vulnerabilidades de inyección CRLF en session.c en sshd en OpenSSH en versiones anteriores a 7.2p2 permite a usuarios remotos autenticados eludir las restricciones de comandos de shell previstas a través del redireccionamiento de datos X11 manipulados, relacionadas con las funciones (1) do_authenticated1 y (2) session_x11_req.

It was discovered that the OpenSSH server did not sanitize data received in requests to enable X11 forwarding. An authenticated client with restricted SSH access could possibly use this flaw to bypass intended restrictions.

OpenSSH is OpenBSD's SSH protocol implementation. These packages include the core files necessary for both the OpenSSH client and server. It was discovered that the OpenSSH server did not sanitize data received in requests to enable X11 forwarding. An authenticated client with restricted SSH access could possibly use this flaw to bypass intended restrictions. An access flaw was discovered in OpenSSH; the OpenSSH client did not correctly handle failures to generate authentication cookies for untrusted X11 forwarding. A malicious or compromised remote X application could possibly use this flaw to establish a trusted connection to the local X server, even if only untrusted X11 forwarding was requested.

*Credits: N/A
CVSS Scores
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
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-03-10 CVE Reserved
  • 2016-03-14 CVE Published
  • 2016-03-15 First Exploit
  • 2024-08-05 CVE Updated
  • 2025-05-04 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-20: Improper Input Validation
CAPEC
References (28)
URL Tag Source
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c X_refsource_confirm
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/session.c.diff?r1=1.281&r2=1.282&f=h X_refsource_confirm
http://packetstormsecurity.com/files/136234/OpenSSH-7.2p1-xauth-Command-Injection-Bypass.html X_refsource_misc
http://seclists.org/fulldisclosure/2016/Mar/46 Mailing List
http://seclists.org/fulldisclosure/2016/Mar/47 Mailing List
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html X_refsource_confirm
http://www.securityfocus.com/bid/84314 Vdb Entry
http://www.securitytracker.com/id/1035249 Vdb Entry
https://bto.bluecoat.com/security-advisory/sa121 X_refsource_confirm
https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115 X_refsource_misc
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html Mailing List
URL Date SRC
https://packetstorm.news/files/id/136234 2016-03-15
https://www.exploit-db.com/exploits/39569 2024-08-05
URL Date SRC
URL Date SRC
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183101.html 2018-09-11
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183122.html 2018-09-11
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178838.html 2018-09-11
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179924.html 2018-09-11
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/180491.html 2018-09-11
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184264.html 2018-09-11
http://rhn.redhat.com/errata/RHSA-2016-0465.html 2018-09-11
http://rhn.redhat.com/errata/RHSA-2016-0466.html 2018-09-11
http://www.openssh.com/txt/x11fwd.adv 2018-09-11
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html 2018-09-11
https://security.gentoo.org/glsa/201612-18 2018-09-11
https://www.freebsd.org/security/advisories/FreeBSD-SA-16:14.openssh.asc 2018-09-11
https://access.redhat.com/security/cve/CVE-2016-3115 2016-03-21
https://bugzilla.redhat.com/show_bug.cgi?id=1316829 2016-03-21
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openbsd
Search vendor "Openbsd"
 Openssh
Search vendor "Openbsd" for product "Openssh"
 <= 7.2
Search vendor "Openbsd" for product "Openssh" and version " <= 7.2"
p1
Affected
Oracle
Search vendor "Oracle"
 Vm Server
Search vendor "Oracle" for product "Vm Server"
 3.2
Search vendor "Oracle" for product "Vm Server" and version "3.2"
-
Affected