SSH RSAREF Library Multiple Functions Local Overflow

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
 script_id(10269);
 script_version("1.34");
 script_cvs_date("Date: 2018/11/15 20:50:24");

 script_cve_id("CVE-1999-0834");
 script_bugtraq_id(843);

 script_name(english:"SSH RSAREF Library Multiple Functions Local Overflow");
 script_summary(english:"Checks for the remote SSH version");

 script_set_attribute(attribute:"synopsis", value:"The remote SSH server may allow execution of arbitrary code.");
 script_set_attribute(attribute:"description", value:
"The remote SSH server is version 1.2.27 or earlier.

If this version was compiled against the RSAREF library, then it is
likely to be vulnerable to a buffer overflow that a remote attacker
could exploit to gain root privileges on the affected system.

To determine if you compiled ssh against the RSAREF library, type 'ssh
-V' on the remote host.");
 script_set_attribute(attribute:"see_also", value:"https://seclists.org/bugtraq/1999/Dec/22");
 script_set_attribute(attribute:"solution", value:
"Either re-compile ssh to avoid using the RSAREF library or upgrade to
SSH 2.x or later.");
 script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
 script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
 script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
 script_set_attribute(attribute:"exploit_available", value:"true");

 script_set_attribute(attribute:"vuln_publication_date", value:"1999/12/01");
 script_set_attribute(attribute:"plugin_publication_date", value:"1999/11/11");

 script_set_attribute(attribute:"potential_vulnerability", value:"true");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_end_attributes();

 script_category(ACT_GATHER_INFO);
 script_copyright(english:"This script is Copyright (C) 1999-2018 Tenable Network Security, Inc.");
 script_family(english:"Misc.");

 script_dependencie("ssh_detect.nasl");
 script_require_keys("Settings/ParanoidReport");
 script_require_ports("Services/ssh", 22);

 exit(0);
}

include("audit.inc");
include("backport.inc");
include("global_settings.inc");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = get_kb_item("Services/ssh");
if(!port)port = 22;


banner = get_kb_item("SSH/banner/" + port );
if ( ! banner ) exit(0);

banner = get_backport_banner(banner:banner);

if ( "openssh" >< tolower(banner) ) exit(0);

if(ereg(string:banner, pattern:"SSH-.*-1\.([0-1]|2\.([0-1]..*|2[0-7]))[^0-9]*$", icase:TRUE))security_hole(port);