Test ID:	1.3.6.1.4.1.25623.1.0.871851
Category:	Red Hat Local Security Checks
Title:	RedHat Update for tigervnc and fltk RHSA-2017:2000-01
Summary:	The remote host is missing an update for the 'tigervnc and fltk'; package(s) announced via the referenced advisory.
Description:	Summary: The remote host is missing an update for the 'tigervnc and fltk' package(s) announced via the referenced advisory. Vulnerability Insight: Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients which allows users to connect to other desktops running a VNC server. FLTK (pronounced 'fulltick') is a cross-platform C++ GUI toolkit. It provides modern GUI functionality without the bloat, and supports 3D graphics via OpenGL and its built-in GLUT emulation. The following packages have been upgraded to a later upstream version: tigervnc (1.8.0), fltk (1.3.4). (BZ#1388620, BZ#1413598) Security Fix(es): * A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) * A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) * A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) * An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) * A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) * A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) * A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396) Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section. Affected Software/OS: tigervnc and fltk on Red Hat Enterprise Linux Server (v. 7) Solution: Please Install the Updated Packages. CVSS Score: 6.8 CVSS Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2016-10207 BugTraq ID: 96012 http://www.securityfocus.com/bid/96012 https://security.gentoo.org/glsa/201801-13 http://www.openwall.com/lists/oss-security/2017/02/02/22 http://www.openwall.com/lists/oss-security/2017/02/05/2 RedHat Security Advisories: RHSA-2017:0630 http://rhn.redhat.com/errata/RHSA-2017-0630.html RedHat Security Advisories: RHSA-2017:2000 https://access.redhat.com/errata/RHSA-2017:2000 SuSE Security Announcement: openSUSE-SU-2017:0444 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2017-02/msg00020.html Common Vulnerability Exposure (CVE) ID: CVE-2017-5581 BugTraq ID: 95789 http://www.securityfocus.com/bid/95789 https://security.gentoo.org/glsa/201702-19 http://www.openwall.com/lists/oss-security/2017/01/22/1 http://www.openwall.com/lists/oss-security/2017/01/25/6 Common Vulnerability Exposure (CVE) ID: CVE-2017-7392 BugTraq ID: 97305 http://www.securityfocus.com/bid/97305 Common Vulnerability Exposure (CVE) ID: CVE-2017-7393 Common Vulnerability Exposure (CVE) ID: CVE-2017-7394 Common Vulnerability Exposure (CVE) ID: CVE-2017-7395 Common Vulnerability Exposure (CVE) ID: CVE-2017-7396
Copyright	Copyright (C) 2017 Greenbone AG

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