Default credentials

Xen 4.5.x and earlier enables certain default backends when emulating a VGA device for an x86 HVM guest qemu even when the configuration disables them, which allows local guest users to obtain access to the VGA console by 1 setting the DISPLAY environment variable, when compiled with SDL support,...

CVE-2015-2152

Xen 4.5.x and earlier enables certain default backends when emulating a VGA device for an x86 HVM guest qemu even when the configuration disables them, which allows local guest users to obtain access to the VGA console by 1 setting the DISPLAY environment variable, when compiled with SDL support,...

CVE-2015-2152

Xen 4.5.x and earlier enables certain default backends when emulating a VGA device for an x86 HVM guest qemu even when the configuration disables them, which allows local guest users to obtain access to the VGA console by 1 setting the DISPLAY environment variable, when compiled with SDL support,...

CVE-2015-2152: Undefined Security Weakness

Xen 4.5.x and earlier enables certain default backends when emulating a VGA device for an x86 HVM guest qemu even when the configuration disables them, which allows local guest users to obtain access to the VGA console by 1 setting the DISPLAY environment variable, when compiled with SDL support,...

xen-tools -- HVM qemu unexpectedly enabling emulated VGA graphics backends

The Xen Project reports: When instantiating an emulated VGA device for an x86 HVM guest qemu will by default enable a backend to expose that device, either SDL or VNC depending on the version of qemu and the build time configuration. The libxl toolstack library does not explicitly disable these...

VNC Server (Reflective Injection), Windows Reverse HTTP Stager (winhttp)

Inject a VNC Dll via a reflective loader staged. Tunnel communication over HTTP Windows winhttp This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework module MetasploitModule CachedSize = 533 include Msf::Payload::Stager...

PT-2015-5632

Name of the Vulnerable Software and Affected Versions Xen versions 4.5.x and earlier Description The issue allows local guest users to obtain access to the VGA console. This can be achieved by setting the DISPLAY environment variable when compiled with SDL support, or by connecting to the VNC...

Moderate: Red Hat Security Advisory: libvncserver security update

Updated libvncserver packages that fix two security issues are now available for Red Hat Enterprise Linux 6.5 Extended Update Support. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System CVSS base scores, which give detailed...

VNC Server (Reflective Injection), Hidden Bind Ipknock TCP Stager

Inject a VNC Dll via a reflective loader staged. Listen for a connection. First, the port will need to be knocked from the IP defined in KHOST. This IP will work as an authentication method you can spoof it with tools like hping. After that you could get your shellcode from any IP. The socket wil...

VNC Server (Reflective Injection), Hidden Bind TCP Stager

Inject a VNC Dll via a reflective loader staged. Listen for a connection from a hidden port and spawn a command shell to the allowed host. This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework module MetasploitModule...

Debian Security Advisory DSA 3081-1 (libvncserver - security update)

Several vulnerabilities have been discovered in libvncserver, a library to implement VNC server functionality. These vulnerabilities might result in the execution of arbitrary code or denial of service in both the client and the server side. OpenVAS Vulnerability Test $Id: deb3081.nasl 6995...

MGASA-2014-0466 Updated kdenetwork4 packages fix security vulnerabilities in krfb

A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter CVE-2014-6053, CVE-2014-6054. A malicious VNC client can trigger multiple stack-based buffer overflows by passing a...

Updated kdenetwork4 packages fix security vulnerabilities in krfb

A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter CVE-2014-6053, CVE-2014-6054. A malicious VNC client can trigger multiple stack-based buffer overflows by passing a...

Scientific Linux Security Update : kdenetwork on SL7.x x86_64 (20141111)

A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. CVE-2014-6053 A divide-by-zero flaw was found in the way...

libvncserver: server NULL pointer dereference flaw in ClientCutText message handling

A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client...

libvncserver security update

CentOS Errata and Security Advisory CESA-2014:1826 Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System CVSS ba...

TigerVNC: User-assisted execution of arbitrary code

Background TigerVNC is a high-performance VNC server/client. Description Two boundary errors in TigerVNC could lead to a heap-based buffer overflow. Impact A remote attacker could entice a user to connect to a malicious VNC server using TigerVNC, possibly resulting in execution of arbitrary code...

libvncserver: remote code execution, denial of service

CVE-2014-6051 Integer overflow in MallocFrameBuffer on client side. A malicious VNC server could advertise a very large screen size by RFB protocol, width and height are 16-bit integers, resulting in an integer overflow during malloc on client-side. Heap corruption, and possibly remote code...

[SECURITY] Fedora 19 Update: libvncserver-0.9.10-0.6.20140718git9453be42.fc19

LibVNCServer makes writing a VNC server or more correctly, a program exporting a framebuffer via the Remote Frame Buffer protocol easy. It hides the programmer from the tedious task of managing clients and compression schemata...

[SECURITY] Fedora 21 Update: libvncserver-0.9.10-0.6.20140718git9453be42.fc21

LibVNCServer makes writing a VNC server or more correctly, a program exporting a framebuffer via the Remote Frame Buffer protocol easy. It hides the programmer from the tedious task of managing clients and compression schemata...