Vulnerability Details : CVE-2016-1908
The client in OpenSSH before 7.2 mishandles failed cookie generation for untrusted X11 forwarding and relies on the local X11 server for access-control decisions, which allows remote X11 clients to trigger a fallback and obtain trusted X11 forwarding privileges by leveraging configuration issues on this X11 server, as demonstrated by lack of the SECURITY extension on this X11 server.
Vulnerability category: BypassGain privilege
Threat overview for CVE-2016-1908
Top countries where our scanners detected CVE-2016-1908
Top open port discovered on systems with this issue
22
IPs affected by CVE-2016-1908 734,020
Threat actors abusing to this issue?
Yes
Find out if you* are
affected by CVE-2016-1908!
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Exploit prediction scoring system (EPSS) score for CVE-2016-1908
Probability of exploitation activity in the next 30 days: 0.37%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 69 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2016-1908
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST |
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2016-1908
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-1908
-
http://www.securityfocus.com/bid/84427
OpenSSH CVE-2016-1908 Security Bypass VulnerabilityThird Party Advisory;VDB Entry
-
http://rhn.redhat.com/errata/RHSA-2016-0741.html
RHSA-2016:0741 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://anongit.mindrot.org/openssh.git/commit/?id=ed4ce82dbfa8a3a3c8ea6fa0db113c71e234416c
openssh.git - Portable OpenSSHPatch;Third Party Advisory
-
http://www.openssh.com/txt/release-7.2
Release Notes;Vendor Advisory
-
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
Oracle Linux Bulletin - April 2016Third Party Advisory
-
http://www.securitytracker.com/id/1034705
OpenSSH X11 Forwarding Flaw Lets Users Bypass Trust Restrictions - SecurityTrackerBroken Link;Third Party Advisory;VDB Entry
-
https://bugzilla.redhat.com/show_bug.cgi?id=1298741
1298741 – (CVE-2016-1908) CVE-2016-1908 openssh: possible fallback from untrusted to trusted X11 forwardingIssue Tracking;Patch;Third Party Advisory
-
http://rhn.redhat.com/errata/RHSA-2016-0465.html
RHSA-2016:0465 - Security Advisory - Red Hat Customer PortalThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
-
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
[SECURITY] [DLA 1500-1] openssh security updateMailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/201612-18
OpenSSH: Multiple vulnerabilities (GLSA 201612-18) — Gentoo securityThird Party Advisory
-
http://openwall.com/lists/oss-security/2016/01/15/13
oss-security - Re: Qualys Security Advisory - Roaming through the OpenSSH client: CVE-2016-0777 and CVE-2016-0778Mailing List;Third Party Advisory
Products affected by CVE-2016-1908
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_eus:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:*
- cpe:2.3:o:oracle:linux:7:-:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*