CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
AI Score
Confidence
Low
EPSS
Percentile
68.6%
TigerVNC is prone to a security bypass vulnerability.
# SPDX-FileCopyrightText: 2011 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
CPE = "cpe:/a:tigervnc:tigervnc";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.801898");
script_version("2024-02-15T05:05:39+0000");
script_tag(name:"last_modification", value:"2024-02-15 05:05:39 +0000 (Thu, 15 Feb 2024)");
script_tag(name:"creation_date", value:"2011-06-13 15:28:04 +0200 (Mon, 13 Jun 2011)");
script_cve_id("CVE-2011-1775");
script_tag(name:"cvss_base", value:"5.8");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:N");
script_name("TigerVNC SSL Certificate Validation Security Bypass Vulnerability - Windows");
script_xref(name:"URL", value:"https://bugzilla.redhat.com/show_bug.cgi?id=702470");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/47738");
script_xref(name:"URL", value:"http://www.mail-archive.com/[email protected]/msg01345.html");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2011 Greenbone AG");
script_family("General");
script_dependencies("gb_tigervnc_detect_win.nasl");
script_mandatory_keys("TigerVNC6432/Win/Installed");
script_tag(name:"impact", value:"Successful exploitation allows attackers to perform
man-in-the-middle attacks or impersonate trusted servers, which will aid in
further attacks.");
script_tag(name:"affected", value:"TigerVNC version 1.1beta1");
script_tag(name:"insight", value:"The flaw is caused by improper verification of server's X.509
certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server
via an arbitrary certificate.");
script_tag(name:"solution", value:"No known solution was made available for at least one year since the disclosure
of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer
release, disable respective features, remove the product or replace the product by another one.");
script_tag(name:"summary", value:"TigerVNC is prone to a security bypass vulnerability.");
script_tag(name:"qod_type", value:"registry");
script_tag(name:"solution_type", value:"WillNotFix");
exit(0);
}
include("version_func.inc");
include("host_details.inc");
ver = get_app_version(cpe:CPE);
if(ver)
{
if(version_is_equal(version:ver, test_version:"1.0.90")){
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
}