Vulnerabilities > CVE-2008-6415 - Buffer Errors vulnerability in Youngzsoft Ccproxy 6.5

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
youngzsoft
CWE-119
critical
nessus
NVD
Published: 2009-03-06
Updated: 2017-08-17

Summary

Buffer overflow in YoungZSoft CCProxy 6.5 might allow remote attackers to execute arbitrary code via a CONNECTION request with a long hostname.

Vulnerable Configurations

Part Description Count
Application
Youngzsoft
1

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.

Nessus

NASL familyWeb Servers
NASL idCCPROXY_6_62.NASL
descriptionThe remote host is running CCProxy, a proxy server from Youngzsoft. The installed version is affected by a buffer overflow vulnerability. By sending a
last seen2020-06-01
modified2020-06-02
plugin id34489
published2008-10-24
reporterThis script is Copyright (C) 2008-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/34489
titleCCProxy < 6.62 HTTP Proxy CONNECT Request Handling Remote Overflow
code
#
#  (C) Tenable Network Security, Inc.
#


include("compat.inc");

if (description)
{
  script_id(34489);
  script_version("1.11");

  script_cve_id("CVE-2008-6415");
  script_bugtraq_id(31416);
  script_xref(name:"Secunia", value:"31997"); 

  script_name(english:"CCProxy < 6.62 HTTP Proxy CONNECT Request Handling Remote Overflow");
  script_summary(english:"Checks CCProxy version or tries to crash the service"); 
 
 script_set_attribute(attribute:"synopsis", value:
"The remote proxy server is affected by a buffer overflow
vulnerability." );
 script_set_attribute(attribute:"description", value:
"The remote host is running CCProxy, a proxy server from Youngzsoft. 

The installed version is affected by a buffer overflow vulnerability. 
By sending a 'CONNECT' command along with large amounts of data, it
may be possible to crash the application or to execute arbitrary code
on the remote system." );
 script_set_attribute(attribute:"see_also", value:"http://jbrownsec.blogspot.com/2008/09/ccproxy-near-stealth-patching.html" );
 script_set_attribute(attribute:"see_also", value:"http://www.youngzsoft.net/ccproxy/whatsnew.htm" );
 script_set_attribute(attribute:"solution", value:
"Upgrade to CCProxy 6.62 or later." );
 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: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_cwe_id(119);

 script_set_attribute(attribute:"plugin_publication_date", value: "2008/10/24");
 script_cvs_date("Date: 2018/06/27 18:42:26");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();

  script_category(ACT_MIXED_ATTACK);
  script_family(english:"Web Servers");
  script_copyright(english:"This script is Copyright (C) 2008-2018 Tenable Network Security, Inc.");
  script_dependencies("proxy_connect_detect.nasl");
  script_require_ports(808);
  exit(0);
}

include("global_settings.inc");

port = get_kb_item("Services/http_proxy");
if (!get_tcp_port_state(port)) exit(0);

if(safe_checks())
 {
   banner = get_kb_item("http_proxy/"+port+"/banner");
   banner = strstr(banner, "Proxy-agent");
   banner = chomp(banner);
   
   v = eregmatch(pattern:"^Proxy-agent: CCProxy ([0-9]+)\.([0-9]+)$", string:banner);
   if (isnull(v)) exit(0);
  
   if ( (int(v[1]) < 6) ||
        (int(v[1]) == 6  && int(v[2]) < 62 )
      )
    {
       if (report_verbosity)
        {
         report = string(
                  "\n",
	          "The remote proxy server responded with the following banner : ","\n\n",
	          banner,"\n\n",
		  "Note that Nessus only checked the version in the banner because safe\n", 
		  "checks were enabled for this scan.\n"
	        );	
 	   security_hole(port:port, extra:report);
        }   
        else	
         security_hole(port);
    }
  exit(0);
 }
else
 { 
  # Try to exploit the issue.

  soc = open_sock_tcp(port);
  if(!soc) exit(0);

  exploit = crap(length:1033, data:"a");

  req = strcat('CONNECT ', exploit, ' HTTP/1.1\r\n\r\n');
  send(socket:soc, data: req);
  banner = recv_line(socket:soc, length:4096);

  # Check if the Proxy service is alive 

  soc = open_sock_tcp(port);
  if(soc) 
   {
    close(soc);
    exit(0);
   } 

 # Try 3 more times before reporting.
  for(i = 0; i < 3 ; i++)
  {
    sleep(1);
    soc = open_sock_tcp(port);
    if(soc) 
    {
     close(soc);
     exit(0);
    }
  }

if(report_verbosity)
  {
    report = string(
                  "\n",
		  "Nessus was able to crash the remote proxy by sending the following\n",
		  "request :\n\n",
		  req); 				
	security_hole(port:port,extra:report);
  }
  else
    security_hole(port);
}

References