telnet overflow

From: Aramis Orlando (aramisat_private)
Date: Sat Feb 16 2002 - 19:06:29 PST

  • Next message: Larry W. Cashdollar: "Re: slocate bug."

    
     ('binary' encoding is not supported, stored as-is)
    Well .. once again we proved that the coders are to 
    busy to look at they`re code...
    I discovered a bug on telnetd...
    what this : 
    ======================================
    =========
    [root@localhost telnet]# telnet 127.0.0.1 -l "`perl -
    e 'printf "A"x9000'`"
    Trying 127.0.0.1...
    Connected to localhost.localdomain (127.0.0.1).
    Escape character is '^]'.
    Segmentation fault (core dumped)
    [root@localhost telnet]#
    ======================================
    =========
    gdb output : 
    (gdb) info registers
    eax            0x1      1
    ecx            0x401eff00       1075773184
    edx            0x807d398        134730648
    ebx            0x401f19e4       1075780068
    esp            0xbfffd3e8       0xbfffd3e8
    ebp            0xbfffd410       0xbfffd410
    esi            0x41414140       1094795584
    edi            0x807d190        134730128
    eip            0x40146df0       0x40146df0
    eflags         0x10202  66050
    cs             0x23     35
    ss             0x2b     43
    ds             0x2b     43
    es             0x2b     43
    fs             0x2b     43
    gs             0x2b     43
    fctrl          0x0      0
    fstat          0x0      0
    ftag           0x0      0
    fiseg          0x0      0
    fioff          0x0      0
    foseg          0x0      0
    fooff          0x0      0
    fop            0x0      0
    (gdb)
    ======================================
    ==
    but we can`t write a local exploit because : 
    [root@localhost telnet]# ls -al `which telnet`
    -rwxr-xr-x    1 root     root       130956 Mar 30  
    2001 /usr/kerberos/bin/telnet
    [root@localhost telnet]#
    ======================================
    ==
    --==Aramis==--
    



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