CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
93.1%
The remote host is running FortressSSH, an enterprise-class SSH server for Windows.
According to its banner, the installed version of this software reportedly contains a buffer overflow vulnerability involving a boundary error in the logging of contents of ‘SSH_MSG_KEXINIT’ messages. An unauthenticated attacker may be able to leverage this issue to crash the affected application or to execute arbitrary code on the affected host
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(21589);
script_version("1.14");
script_cve_id("CVE-2006-2421");
script_bugtraq_id(17991);
script_name(english:"FortressSSH SSH_MSG_KEXINIT Logging Remote Overflow");
script_summary(english:"Does a banner check for FortressSSH");
script_set_attribute(attribute:"synopsis", value:
"The remote SSH server is affected by a remote buffer overflow issue." );
script_set_attribute(attribute:"description", value:
"The remote host is running FortressSSH, an enterprise-class SSH server
for Windows.
According to its banner, the installed version of this software
reportedly contains a buffer overflow vulnerability involving a
boundary error in the logging of contents of 'SSH_MSG_KEXINIT'
messages. An unauthenticated attacker may be able to leverage this
issue to crash the affected application or to execute arbitrary code
on the affected host" );
script_set_attribute(attribute:"solution", value:
"Unknown at this time." );
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_publication_date", value: "2006/05/23");
script_set_attribute(attribute:"vuln_publication_date", value: "2006/05/16");
script_cvs_date("Date: 2018/07/11 17:09:26");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Misc.");
script_copyright(english:"This script is Copyright (C) 2006-2018 Tenable Network Security, Inc.");
script_dependencies("ssh_detect.nasl");
script_require_ports("Services/ssh", 22);
exit(0);
}
port = get_kb_item("Services/ssh");
if (!port) port = 22;
if (!get_port_state(port)) exit(0);
# Get the version number from the banner.
banner = get_kb_item("SSH/banner/" + port);
if (!banner) exit(0);
if ("Pragma FortressSSH" >!< banner) exit(0);
pat = "Pragma FortressSSH (.+)";
ver = NULL;
matches = egrep(string:banner, pattern:pat);
if (matches)
{
foreach match (split(matches))
{
match = chomp(match);
ver = eregmatch(pattern:pat, string:match);
if (!isnull(ver))
{
ver = ver[1];
break;
}
}
}
# There's a problem if the version's <= 4.0.7.20.
if (!isnull(ver))
{
iver = split(ver, sep:'.', keep:FALSE);
if (
int(iver[0]) < 4 ||
(
int(iver[0]) == 4 && int(iver[1]) == 0 &&
(
int(iver[2]) < 7 ||
(int(iver[2]) == 7 && int(iver[3]) <= 20)
)
)
) security_hole(port);
}