Detecting fake library versions

[Matthew Seaman]

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On 17/06/2010 08:34:52, Matthew Seaman wrote:
> On 17/06/2010 01:59:04, Warren Block wrote:
>> On Wed, 16 Jun 2010, Warren Block wrote:
> 
>>> "ln -s libintl.so.9 libintl.so.8" has been misused a lot lately.
>>>
>>> Are there any programs that will detect these links and remind the
>>> user that they have a new library masquerading as an old one?
> 
>> A quick hack in Ruby to address this:
> 
>> http://www.wonkity.com/~wblock/fakelib/fakelib.rb
> 
>> It's not particularly fast or elegant.  On the other hand, it's short
>> and does detect the link above.
> 
> Trying much too hard there.  This command is all you need:
> 
>    find /usr/lib /lib -name '*.so.*' -type l
> 
> Any file named libfoo.so.N in the base system should be a regular file:
> any symbolic links indicate shlib abuse.
> 
> This is not generally true for shlibs installed from ports, mostly due
> to the prevalence of linuxisms like ABI version numbers that aren't
> simple integers.  Even so, applying a little intelligent scrutiny to the
> list of results will help you sort out any spurious linkage.

"But what about hard links?" I hear you ask.  Simple:

  find /usr/lib /lib -name '*.so.*' -links +2

	Cheers,

	Matthew

- -- 
Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
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