Re: Linux kernel source archive vulnerable

[Lee Ball <lee () effective-it co uk>]

Hadmut Danisch wrote:
> On Fri, Sep 08, 2006 at 12:52:22AM +0530, Raj Mathur wrote:
> > I wouldn't know if something has changed drastically between 2.6.16
> > and 2.6.17.11, but:
> >
> > raju@mail:~$ find /usr/src/linux-2.6.16/ -perm -666 ! -type l
> > raju@mail:~$
> >
> > Not a single world-writable file or directory.  Perhaps pre-release
> > kernel tarballs are more lax?
>
>
> On my machine (I also have a 2.6.16):
>
> # find /usr/src/linux-2.6.16/ -perm -666 ! -type l | wc -l
> 20434
>
> Just to doublecheck I wrote a script which parses the kernel tar:
>
> pax_global_header                                                              52 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/                                                                0 b mode=777 uid=    0 gid=    0
> linux-2.6.17.11/.gitignore                                                    462 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/COPYING                                                     18693 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/CREDITS                                                     89536 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/                                                  0 b mode=777 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/00-INDEX                                      10581 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/BUG-HUNTING                                    7249 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/Changes                                       11655 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/CodingStyle                                   17843 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/DMA-API.txt                                   21291 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/DMA-ISA-LPC.txt                                5332 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/DMA-mapping.txt                               32801 b mode=666 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/DocBook/                                          0 b mode=777 uid=    0 gid=    0
> linux-2.6.17.11/Documentation/DocBook/.gitignore                               35 b mode=666 uid=    0 gid=    0
> ...
>
>
> A friend of mine confirmed to also have world writable dirs and files.
>
> regards
> Hadmut

Sorry to add my 2 pence worth but I noticed that Raj ran his command as
a normal user and you Hadmut have ran yours as root. Isn't it going to
be ok as the directories above these world writeable files aren't
writeable/readable by a non-superuser?

Cheers

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